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Liquid fun (2014)

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Overview

LiquidFun is a 2D rigid-body and fluid simulation C++ library for games based upon Box2D. It provides support for procedural animation of physical bodies to make objects move and interact in realistic ways.

Stable releases of LiquidFun are available for download from github.com/google/liquidfun/releases.

LiquidFun source code is available for download from github.com/google/liquidfun.

Discuss LiquidFun with other developers and users on themailing list. Report issues on theissues tracker or post your questions tostackoverflow.com tagged with "liquidfun".

Testbed

You can write LiquidFun code in C++, Java, or JavaScript. Here is our testbed program ported to JavaScript. It runs LiquidFun in your browser.

Documentation

Trailer

Examples

The following videos show the Testbed application demonstrating LiquidFun's fluid simulation functionality. The videos are recordings of Android build of the Testbed application.

Dambreak

An initially rectangle shaped wall of water particles falling under gravity and crashing around a rectangular space.

Elastic Particles

Three groups of elastic particles interacting with a circular rigid body.

Particles

Water particles falling under gravity into a container with a circular rigid body displacing them.

Surface Tension

Three different colored groups of particles with surface tension demonstrating attraction and color mixing.

Wave Machine

Water sloshing around an oscillating container.


Nvidia robot reference platforms

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NVIDIA Jetson Reference Platforms have been developed by our partners to accelerate robotics research and development. These platforms come with software tools and APIs for developing AI enabled applications and offer flexibility for adding more sensors.

The NVIDIA Isaac Initiative is an end-to-end platform that will help ignite a robotics revolution. It brings together the NVIDIA Jetson TX2, a custom software stack, a simulation environment for training and testing AI-powered robots as well as reference platforms to build on, enabling developers to create prototypes and products faster and safer. Sign up to receive the latest news and info about the Isaac Initiative.

Skylake now GA on GCE

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In the gcloud command line tool, use the instances create subcommand, followed by the --min-cpu-platform flag to specify a minimum CPU platform.

For example, the following command creates an n1-standard-1 instance with the Intel Broadwell (or later) CPU platform.

gcloud beta compute instances create example-instance --machine-type 
n1-standard-1 --min-cpu-platform “Intel Broadwell”

To see which CPUs are available in different GCP zones, check our Available Regions and Zones page. For complete instructions for using --min-cpu-platform, please refer to our documentation.

Extended memory, where you want it

Compute Engine Custom Machine Types allow you to create virtual machines with the vCPUs and memory ratios to fit your application needs. Now, with extended memory, we’ve removed memory ratio restrictions for a vCPU (previously set at 6.5GB), for a maximum of 455GB of memory per VM instance. This is great news for applications like in-memory databases (e.g. Memcached & Redis), high-performance relational databases (e.g. Microsoft SQL Server) and NoSQL databases (e.g. MongoDB) that benefit from flexible memory configurations to achieve optimum price-performance. To learn more about the pricing for extended memory please take a look at our pricing page.

You can create a VM with extended memory using the Cloud Console, Cloud SDK or APIs.


For example, this command creates a 2 vCPU, 15GB memory instance (including an extended memory of 2GB):
gcloud beta compute instances create example-instance 
--custom-cpu 2 --custom-memory 15 --custom-extensions

Complete instructions for using extended memory are available in our documentation.

Get started today

The minimum CPU platform selector, extended memory to 455GB, availability of 64 vCPUs machines, Broadwell processors in all regions and the GA of Skylake processors are now all available for you and your applications. If you’re new to GCP you can try all of this out when you sign up for $300 free trial. We’d love to hear about the amazing things you do with these Compute Engine enhancements in the comments below.

Kubernetes by Example

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This is a hands-on introduction to Kubernetes. Browse the examples:

Want to try it out yourself? You can run all this on Red Hat’s distribution of Kubernetes, OpenShift. Follow the instructions here for a local setup or sign up for openshift.com for an online environment.

A Generative Approach to Simulating Watercolor Paints

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The steps so far will produce a shape that has somewhat soft edges all around. In order to give the border sharp edges in some areas and soft edges in others, we can assign different levels of "variance" to each line segment. Segments with high variance will undergo large changes in each mutation round, and segments with low variance will undergo small changes. When a segment is split into two child segments, those children can inherit the parent's variance. Of course, the variance needs to decrease somewhat, and it's also a good idea to slightly randomize what variance each child gets assigned. With this change in place, the blobs look more interesting:

The dark legacy of Carlos Castaneda (2007)

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For fans of the literary con, it’s been a great few years. Currently, we have Richard Gere starring as Clifford Irving in “The Hoax,” a film about the ’70s novelist who penned a faux autobiography of Howard Hughes. We’ve had the unmasking of James Frey,JT LeRoy/Laura Albert and Harvard’s Kaavya Viswanathan, who plagiarized large chunks of her debut novel, forcing her publisher, Little, Brown and Co., to recall the book. Much has been written about the slippery boundaries between fiction and nonfiction, the publishing industry’s responsibility for distinguishing between the two, and the potential damage to readers. There’s been, however, hardly a mention of the 20th century’s most successful literary trickster: Carlos Castaneda.

If this name draws a blank for readers under 30, all they have to do is ask their parents. Deemed by Time magazine the “Godfather of the New Age,” Castaneda was the literary embodiment of the Woodstock era. His 12 books, supposedly based on meetings with a mysterious Indian shaman, don Juan, made the author, a graduate student in anthropology, a worldwide celebrity. Admirers included John Lennon, William Burroughs, Federico Fellini and Jim Morrison.

Under don Juan’s tutelage, Castaneda took peyote, talked to coyotes, turned into a crow, and learned how to fly. All this took place in what don Juan called “a separate reality.” Castaneda, who died in 1998, was, from 1971 to 1982, one of the best-selling nonfiction authors in the country. During his lifetime, his books sold at least 10 million copies.

Castaneda was viewed by many as a compelling writer, and his early books received overwhelmingly positive reviews. Time called them “beautifully lucid” and remarked on a “narrative power unmatched in other anthropological studies.” They were widely accepted as factual, and this contributed to their success. Richard Jennings, an attorney who became closely involved with Castaneda in the ’90s, was studying at Stanford in the early ’70s when he read the first two don Juan books. “I was a searcher,” he recently told Salon. “I was looking for a real path to other worlds. I wasn’t looking for metaphors.”

The books’ status as serious anthropology went almost unchallenged for five years. Skepticism increased in 1972 after Joyce Carol Oates, in a letter to the New York Times, expressed bewilderment that a reviewer had accepted Castaneda’s books as nonfiction. The next year, Time published a cover story revealing that Castaneda had lied extensively about his past. Over the next decade, several researchers, most prominently Richard de Mille, son of the legendary director, worked tirelessly to demonstrate that Castaneda’s work was a hoax.

In spite of this exhaustive debunking, the don Juan books still sell well. The University of California Press, which published Castaneda’s first book, “The Teachings of Don Juan: A Yaqui Way of Knowledge,” in 1968, steadily sells 7,500 copies a year. BookScan, a Nielsen company that tracks book sales, reports that three of Castaneda’s most popular titles, “A Separate Reality,” “Journey to Ixtlan” and “Tales of Power,” sold a total of 10,000 copies in 2006. None of Castaneda’s titles have ever gone out of print — an impressive achievement for any author.

Today, Simon and Schuster, Castaneda’s main publisher, still classifies his books as nonfiction. It could be argued that this label doesn’t matter since everyone now knows don Juan was a fictional creation. But everyone doesn’t, and the trust that some readers have invested in these books leads to a darker story that has received almost no coverage in the mainstream press.

Castaneda, who disappeared from the public view in 1973, began in the last decade of his life to organize a secretive group of devoted followers. His tools were his books and Tensegrity, a movement technique he claimed had been passed down by 25 generations of Toltec shamans. A corporation, Cleargreen, was set up to promote Tensegrity; it held workshops attended by thousands. Novelist and director Bruce Wagner, a member of Castaneda’s inner circle, helped produce a series of instructional videos. Cleargreen continues to operate to this day, promoting Tensegrity and Castaneda’s teachings through workshops in Southern California, Europe and Latin America.

At the heart of Castaneda’s movement was a group of intensely devoted women, all of whom were or had been his lovers. They were known as the witches, and two of them, Florinda Donner-Grau and Taisha Abelar, vanished the day after Castaneda’s death, along with Cleargreen president Amalia Marquez and Tensegrity instructor Kylie Lundahl. A few weeks later, Patricia Partin, Castaneda’s adopted daughter as well as his lover, also disappeared. In February 2006, a skeleton found in Death Valley, Calif., was identified through DNA analysis as Partin’s.

Some former Castaneda associates suspect the missing women committed suicide. They cite remarks the women made shortly before vanishing, and point to Castaneda’s frequent discussion of suicide in private group meetings. Achieving transcendence through a death nobly chosen, they maintain, had long been central to his teachings.

Castaneda was born in 1925 and came to the United States in 1951 from Peru. He’d studied sculpture at the School of Fine Arts in Lima and hoped to make it as an artist in the United States. He worked a series of odd jobs and took classes at Los Angeles Community College in philosophy, literature and creative writing. Most who knew him then recall a brilliant, hilarious storyteller with mesmerizing brown eyes. He was short (some say 5-foot-2; others 5-foot-5) and self-conscious about having his picture taken. Along with his then wife Margaret Runyan (whose memoir, “A Magical Journey With Carlos Castaneda,” he would later try to suppress) he became fascinated by the occult.

According to Runyan, she and Castaneda would hold long bull sessions, drinking wine with other students. One night a friend remarked that neither the Buddha nor Jesus ever wrote anything down. Their teachings had been recorded by disciples, who could have changed things or made them up. “Carlos nodded, as if thinking carefully,” wrote Runyan. Together, she and Castaneda conducted unsuccessful ESP experiments. Runyan worked for the phone company, and Castaneda’s first attempt at a book was an uncompleted nonfiction manuscript titled “Dial Operator.”

In 1959, Castaneda enrolled at UCLA, where he signed up for California ethnography with archaeology professor Clement Meighan. One of the assignments was to interview an Indian. He got an “A” for his paper, in which he spoke to an unnamed Native American about the ceremonial use of jimson weed. But Castaneda was broke and soon dropped out. He worked in a liquor store and drove a taxi. He began to disappear for days at a time, telling Runyan he was going to the desert. The couple separated, but soon afterward Castaneda adopted C.J., the son Runyan had had with another man. And, for seven years, he worked on the manuscript that was to become “The Teachings of Don Juan.”

“The Teachings” begins with a young man named Carlos being introduced at an Arizona bus stop to don Juan, an old Yaqui Indian whom he’s told “is very learned about plants.” Carlos tries to persuade the reluctant don Juan to teach him about peyote. Eventually he relents, allowing Carlos to ingest the sacred cactus buds. Carlos sees a transparent black dog, which, don Juan later tells him, is Mescalito, a powerful supernatural being. His appearance is a sign that Carlos is “the chosen one” who’s been picked to receive “the teachings.”

“The Teachings” is largely a dialogue between don Juan, the master, and Carlos, the student, punctuated by the ingestion of carefully prepared mixtures of herbs and mushrooms. Carlos has strange experiences that, in spite of don Juan’s admonitions, he continues to think of as hallucinations. In one instance, Carlos turns into a crow and flies. Afterward, an argument ensues: Is there such a thing as objective reality? Or is reality just perceptions and different, equally valid ways of describing them? Toward the book’s end, Carlos again encounters Mescalito, whom he now accepts as real, not a hallucination.

In “The Teachings,” Castaneda tried to follow the conventions of anthropology by appending a 50-page “structural analysis.” According to Runyan, his goal was to become a psychedelic scholar along the lines of Aldous Huxley. He’d become disillusioned with another hero, Timothy Leary, who supposedly mocked Castaneda when they met at a party, earning his lifelong enmity. In 1967, he took his manuscript to professor Meighan. Castaneda was disappointed when Meighan told him it would work better as a trade book than as a scholarly monograph. But following Meighan’s instructions, Castaneda took his manuscript to the University of California Press’ office in Powell Library, where he showed it to Jim Quebec. The editor was impressed but had doubts about its authenticity. Inundated by good reports from the UCLA anthropology department, according to Runyan, Quebec was convinced and “The Teachings” was published in the spring of 1968.

Runyan wrote that “the University of California Press, fully cognizant that a nation of drug-infatuated students was out there, moved it into California bookstores with a vengeance.” Sales exceeded all expectations, and Quebec soon introduced Castaneda to Ned Brown, an agent whose clients included Jackie Collins. Brown then put Castaneda in touch with Michael Korda, Simon and Schuster’s new editor in chief.

In his memoir, “Another Life,” Korda recounts their first meeting. Korda was told to wait in a hotel parking lot. “A neat Volvo pulled up in front of me, and the driver waved me in,” Korda writes. “He was a robust, broad-chested, muscular man, with a swarthy complexion, dark eyes, black curly hair cut short, and a grin as merry as Friar Tuck’s … I had seldom, if ever, liked anybody so much so quickly … It wasn’t so much what Castaneda had to say as his presence — a kind of charm that was partly subtle intelligence, partly a real affection for people, and partly a kind of innocence, not of the naive kind but of the kind one likes to suppose saints, holy men, prophets and gurus have.” The next morning, Korda set about buying the rights to “The Teachings.” Under his new editor’s guidance, Castaneda published his next three books in quick succession. In “A Separate Reality,” published in 1971, Carlos returns to Mexico to give don Juan a copy of his new book. Don Juan declines the gift, suggesting he’d use it as toilet paper. A new cycle of apprenticeship begins, in which don Juan tries to teach Carlos how to “see.”

New characters appear, most importantly don Juan’s friend and fellow sorcerer don Genaro. In “A Separate Reality” and the two books that follow, “Journey to Ixtlan” and “Tales of Power,” numerous new concepts are introduced, including “becoming inaccessible,” “erasing personal history” and “stopping the world.”

There are also displays of magic. Don Genaro is at one moment standing next to Carlos; at the next, he’s on top of a mountain. Don Juan uses unseen powers to help Carlos start his stalled car. And he tries to show him how to be a warrior — a being who, like an enlightened Buddhist, has eliminated the ego, but who, in a more Nietzschean vein, knows he’s superior to regular humans, who lead wasted, pointless lives. Don Juan also tries to teach Carlos how to enter the world of dreams, the “separate reality,” also referred to as the “nagual,” a Spanish word taken from the Aztecs. (Later, Castaneda would shift the word’s meaning, making it stand not only for the separate reality but also for a shaman, like don Juan and, eventually, Castaneda himself.)

In “Journey to Ixtlan,” Carlos starts a new round of apprenticeship. Don Juan tells him they’ll no longer use drugs. These were only necessary when Carlos was a beginner. Many consider “Ixtlan,” which served as Castaneda’s Ph.D. thesis at UCLA, his most beautiful book. It also made him a millionaire. At the book’s conclusion, Carlos talks to a luminous coyote. But he isn’t yet ready to enter the nagual. Finally, at the end of “Tales of Power,” don Juan and don Genaro take Carlos to the edge of a cliff. If he has the courage to leap, he’ll at last be a full-fledged sorcerer. This time Carlos doesn’t turn back. He jumps into the abyss.

– – – – – – – – – – – –

All four books were lavishly praised. Michael Murphy, a founder of Esalen, remarked that the “essential lessons don Juan has to teach are the timeless ones that have been taught by the great sages of India.” There were raves in the New York Times, Harper’s and the Saturday Review. “Castaneda’s meeting with Don Juan,” wrote Time’s Robert Hughes, “now seems one of the most fortunate literary encounters since Boswell was introduced to Dr. Johnson.”

In 1972, anthropologist Paul Riesman reviewed Castaneda’s first three books in the New York Times Book Review, writing that “Castaneda makes it clear that the teachings of don Juan do tell us something of how the world really is.” Riesman’s article ran in place of a review the Times had initially commissioned from Weston La Barre, one of the foremost authorities on Native American peyote ceremonies. In his unpublished article, La Barre denounced Castaneda’s writing as “pseudo-profound deeply vulgar pseudo-ethnography.”

Contacted recently, Roger Jellinek, the editor who commissioned both reviews, explained his decision. “The Weston La Barre review, as I recall, was not so much a review as a furious ad hominem diatribe intended to suppress, not debate, the book,” he wrote via e-mail. “By then I knew enough about Castaneda, from discussions with Edmund Carpenter, the anthropologist who first put me on to Castaneda, and from my reading of renowned shamanism scholar Mircea Eliade in support of my own review of Castaneda in the daily New York Times, to feel strongly that ‘The Teachings of Don Juan’ deserved more than a personal put-down. Hence the second commission to Paul Riesman, son of Harvard sociologist David Riesman, and a brilliant rising anthropologist. Incidentally, in all my eight years at the NYTBR, that’s the only occasion I can recall of a review being commissioned twice.”

Riesman’s glowing review was soon followed by Oates’ letter to the editor, in which she argued that the books were obvious works of fiction. Then, in 1973, Time correspondent Sandra Burton found that Castaneda had lied about his military service, his father’s occupation, his age and his nation of birth (Peru not Brazil).

No one contributed more to Castaneda’s debunking than Richard de Mille. De Mille, who held a Ph.D. in psychology from USC, was something of a freelance intellectual. In a recent interview, he remarked that because he wasn’t associated with a university, he could tell the story straight. “People in the academy wouldn’t do it,” he remarked. “They’d be embarrassing the establishment.” Specifically the UCLA professors who, according to de Mille, knew it was a hoax from the start. But a hoax that, he said, supported their theories, which de Mille summed up succinctly: “Reality doesn’t exist. It’s all what people say to each other.”

In de Mille’s first exposé, “Castaneda’s Journey,” which appeared in 1976, he pointed to numerous internal contradictions in Castaneda’s field reports and the absence of convincing details. “During nine years of collecting plants and hunting animals with don Juan, Carlos learns not one Indian name for any plant or animal,” De Mille wrote. The books were also filled with implausible details. For example, while “incessantly sauntering across the sands in seasons when … harsh conditions keep prudent persons away, Carlos and don Juan go quite unmolested by pests that normally torment desert hikers.”

De Mille also uncovered numerous instances of plagiarism. “When don Juan opens his mouth,” he wrote, “the words of particular writers come out.” His 1980 compilation, “The Don Juan Papers,” includes a 47-page glossary of quotations from don Juan and their sources, ranging from Wittgenstein and C.S. Lewis to papers in obscure anthropology journals.

In one example, de Mille first quotes a passage by a mystic, Yogi Ramacharaka: “The Human Aura is seen by the psychic observer as a luminous cloud, egg-shaped, streaked by fine lines like stiff bristles standing out in all directions.” In “A Separate Reality,” a “man looks like a human egg of circulating fibers. And his arms and legs are like luminous bristles bursting out in all directions.” The accumulation of such instances leads de Mille to conclude that “Carlos’s adventures originated not in the Sonoran desert but in the library at UCLA.” De Mille convinced many previously sympathetic readers that don Juan did not exist. Perhaps the most glaring evidence was that the Yaqui don’t use peyote, and don Juan was supposedly a Yaqui shaman teaching a “Yaqui way of knowledge.” Even the New York Times came around, declaring that de Mille’s research “should satisfy anyone still in doubt.”

Some anthropologists have disagreed with de Mille on certain points. J.T. Fikes, author of “Carlos Castaneda, Academic Opportunism and the Psychedelic Sixties,” believes Castaneda did have some contact with Native Americans. But he’s an even fiercer critic than de Mille, condemning Castaneda for the effect his stories have had on Native peoples. Following the publication of “The Teachings,” thousands of pilgrims descended on Yaqui territory. When they discovered that the Yaqui don’t use peyote, but that the Huichol people do, they headed to the Huichol homeland in Southern Mexico, where, according to Fikes, they caused serious disruption. Fikes recounts with outrage the story of one Huichol elder being murdered by a stoned gringo.

Among anthropologists, there’s no longer a debate. Professor William W. Kelly, chairman of Yale’s anthropology department, told me, “I doubt you’ll find an anthropologist of my generation who regards Castaneda as anything but a clever con man. It was a hoax, and surely don Juan never existed as anything like the figure of his books. Perhaps to many it is an amusing footnote to the gullibility of naive scholars, although to me it remains a disturbing and unforgivable breach of ethics.”

After 1973, the year of the Time exposé, Castaneda never again responded publicly to criticism. Instead, he went into seclusion, at least as far as the press was concerned (he still went to Hollywood parties). Claiming he was complying with don Juan’s instruction to become “inaccessible,” he no longer allowed himself to be photographed, and (in the same year the existence of the Nixon tapes was made public) he decided that recordings of any sort were forbidden. He also severed ties to his past; after attending C.J.’s junior high graduation and promising to take him to Europe, he soon banished his ex-wife and son.

And he made don Juan disappear. When “The Second Ring of Power” was published in 1977, readers learned that sometime between the leap into the abyss at the end of “Tales of Power” and the start of the new book, don Juan had vanished, evanescing into a ball of light and entering the nagual. His seclusion also helped Castaneda, now in his late 40s, conceal the alternative family he was starting to form. The key members were three young women: Regine Thal, Maryann Simko and Kathleen “Chickie” Pohlman, whom Castaneda had met while he was still active at UCLA. Simko was pursuing a Ph.D. in anthropology and was known around campus as Castaneda’s girlfriend. Through her, Castaneda met Thal, another anthropology Ph.D. candidate and Simko’s friend from karate class. How Pohlman entered the picture remains unclear.

In 1973, Castaneda purchased a compound on the aptly named Pandora Avenue in Westwood. The women, soon to be known both in his group and in his books as “the witches,” moved in. They eventually came to sport identical short, dyed blond haircuts similar to those later worn by the Heaven’s Gate cult. They also said they’d studied with don Juan.

In keeping with the philosophy of “erasing personal history,” they changed their names: Simko became Taisha Abelar; Thal, Florinda Donner-Grau. Donner-Grau is remembered by many as Castaneda’s equal in intelligence and charisma. Nicknamed “the hummingbird” because of her ceaseless energy, she was born in Venezuela to German parents and claimed to have done research on the Yanomami Indians. Pohlman was given a somewhat less glamorous alias: Carol Tiggs. Donner-Grau and Abelar eventually published their own books on sorcery.

The witches, along with Castaneda, maintained a tight veil of secrecy. They used numerous aliases and didn’t allow themselves to be photographed. Followers were told constantly changing stories about their backgrounds. Only after Castaneda’s death did the real facts about their lives begin to emerge. This is largely due to the work of three of his ex-followers.

In the early ’90s, Richard Jennings, a Columbia Law graduate, was living in Los Angeles. He was the executive director of Hollywood Supports, a nonprofit group organized to fight discrimination against people with HIV. He’d previously been the executive director of GLAAD, the Gay and Lesbian Alliance Against Defamation. After reading an article in Details magazine by Bruce Wagner about a meeting with Castaneda, he became intrigued. By looking on the Internet, he found his way to one of the semi-secret workshops being held around Los Angeles. He was soon invited to participate in Castaneda’s Sunday sessions, exclusive classes for select followers, where Jennings kept copious notes. From 1995 to 1998 he was deeply involved in the group, sometimes advising on legal matters. After Castaneda’s death, he started a Web site, Sustained Action, for which he compiled meticulously researched chronologies, dating from 1947 to 1999, of the lives of Patricia Partin and the witches.

Another former insider is Amy Wallace, author of 13 books of fiction and nonfiction, including the best-selling “Book of Lists,” which she co-authored with her brother David Wallechinksy and their father, novelist Irving Wallace, also a client of Korda’s. (Amy Wallace has contributed to Salon.) She first met Castaneda in 1973, while she was still in high school. Her parents took her to a dinner party held by agent Ned Brown. Castaneda was there with Abelar, who then went under the name Anna-Marie Carter. They talked with Wallace about her boarding school. Many years later, Wallace became one of Castaneda’s numerous lovers, an experience recounted in her memoir, “Sorcerer’s Apprentice.” Wallace now lives in East Los Angeles, where she’s working on a novel about punk rock.

Gaby Geuter, an author and former travel agent, had been a workshop attendee who hoped to join the inner circle. In 1996 she realized she was being shut out. In an effort to find out the truth about the guru who’d rejected her, she, along with her husband, Greg Mamishian, began to shadow Castaneda. In her book “Filming Castaneda,” she recounts how, from a car parked near his compound, they secretly videotaped the group’s comings and goings. Were it not for Geuter there’d be no post-1973 photographic record of Castaneda, who, as he aged, seemed to have retained his impish charm as well as a full head of silver hair. They also went through his trash, discovering a treasure-trove of documents, including marriage certificates, letters and credit card receipts that would later provide clues to the group’s history and its behavior during Castaneda’s final days.

During the late ’70s and early ’80s, Jennings believes the group probably numbered no more than two dozen. Members, mostly women, came and went. At the time, a pivotal event was the defection of Carol Tiggs, who was, according to Wallace, always the most ambivalent witch. Soon after joining, she tried to break away. She attended California Acupuncture College, married a fellow student and lived in Pacific Palisades. Eventually, Wallace says, Castaneda lured her back.

Castaneda had a different version. In his 1981 bestseller, “The Eagle’s Gift,” he described how Tiggs vanished into the “second attention,” one of his terms for infinity. Eventually she reappeared through a space time portal in New Mexico. She then made her way to L.A., where they were joyously reunited when he found her on Santa Monica Boulevard. In homage to her 10 years in another dimension, she was now known as the “nagual woman.”

Wallace believes this was an incentive to get Tiggs to rejoin. According to Wallace and Jennings, one of the witches’ tasks was to recruit new members. Melissa Ward, a Los Angeles area caterer, was involved in the group from 1993 to 1994. “Frequently they recruited at lectures,” she told me. Among the goals, she said, was to find “women with a combination of brains and beauty and vulnerability.” Initiation into the inner family often involved sleeping with Castaneda, who, the witches claimed in public appearances, was celibate.

In “Sorcerer’s Apprentice,” Wallace provides a detailed picture of her own seduction. Because of her father’s friendship with Castaneda, her case was unusual. Over the years, he’d stop by the Wallace home. When Irving died in 1990, Amy was living in Berkeley, Calif. Soon after, Castaneda called and told her that her father had appeared to him in a dream and said he was trapped in the Wallace’s house, and needed Amy and Carlos to free him.

Wallace, suitably skeptical, came down to L.A. and the seduction began in earnest. She recounts how she soon found herself in bed with Castaneda. He told her he hadn’t had sex for 20 years. When Wallace later worried she might have gotten pregnant (they’d used no birth control), Castaneda leapt from the bed, shouting, “Me make you pregnant? Impossible! The nagual’s sperm isn’t human … Don’t let any of the nagual’s sperm out, nena. It will burn away your humanness.” He didn’t mention the vasectomy he’d had years before.

The courtship continued for several weeks. Castaneda told her they were “energetically married.” One afternoon, he took her to the sorcerer’s compound. As they were leaving, Wallace looked at a street sign so she could remember the location. Castaneda furiously berated her: A warrior wouldn’t have looked. He ordered her to return to Berkeley. She did. When she called, he refused to speak to her.

The witches, however, did, instructing Wallace on the sorceric steps necessary to return. She had to let go of her attachments. Wallace got rid of her cats. This didn’t cut it. Castaneda, she wrote, got on the phone and called her an egotistical, spoiled Jew. He ordered her to get a job at McDonald’s. Instead, Wallace waitressed at a bed and breakfast. Six months later she was allowed back.

Aspiring warriors, say Jennings, Wallace and Ward, were urged to cut off all contact with their past lives, as don Juan had instructed Carlos to do, and as Castaneda had done by cutting off his wife and adopted son. “He was telling us how to get out of family obligations,” Jennings told me. “Being in one-on-one relationships would hold you back from the path. Castaneda was telling us how to get out of commitments with family, down to small points like how to avoid hugging your parents directly.” Jennings estimates that during his four years with the group, between 75 and 100 people were told to cut off their families. He doesn’t know how many did.

For some initiates, the separation was brutal and final. According to Wallace, acolytes were told to tell their families, “I send you to hell.” Both Wallace and Jennings tell of one young woman who, in the group’s early years, had been ordered by Castaneda to hit her mother, a Holocaust survivor. Many years later, Wallace told me, the woman “cried about it. She’d done it because she thought he was so psychic he could tell if she didn’t.” Wallace also describes how, when one young man’s parents died soon after being cut off, Castaneda singled him out for praise, remarking, “When you really do it, don Juan told me, they die instantly, as if you were squashing a flea — and that’s all they are, fleas.”

Before entering the innermost circle, at least some followers were led into a position of emotional and financial dependence. Ward remembers a woman named Peggy who was instructed to quit her job. She was told she’d then be given cash to get a phone-less apartment, where she would wait to hear from Castaneda or the witches. Peggy fled before this happened. But Ward said this was a common practice with women about to be brought into the family’s core.

Valerie Kadium, a librarian, who from 1995 to 1996 took part in the Sunday sessions, recalls one participant who, after several meetings, decided to commit himself fully to the group. He went to Vermont to shut down his business, but on returning to L.A., he was told he could no longer participate; he was “too late.” He’d failed to grasp the “cubic centimeter of chance” that, said Kadium, Castaneda often spoke of. Jennings had to quit his job with Hollywood Supports; his work required him to interact with the media, but this was impossible: Sorcerers couldn’t have their pictures taken.

But there were rewards. “I was totally affected by these people,” Jennings told me. “I felt like I’d found a family. I felt like I’d found a path.” Kadium recalls the first time she saw Tensegrity instructor Kylie Lundahl onstage — she saw an aura around her, an apricot glow. Remembering her early days with the group, she remarked, “There was such a sweetness about it. I had such high hopes. I wanted to feel the world more deeply — and I did.”

Although she was later devastated when Castaneda banished her from the Sunday sessions, telling her “the spirits spit you out,” she eventually recovered, and now remembers this as the most exciting time of her life. According to all who knew him, Castaneda wasn’t only mesmerizing, he also had a great sense of humor. “One of the reasons I was involved was the idea that I was in this fascinating, on the edge, avant garde, extraordinary group of beings,” Wallace said. “Life was always exciting. We were free from the tedium of the world.”

And because, as Jennings puts it, Castaneda was a “control freak,” followers were often freed from the anxiety of decision-making. Some had more independence, but even Wallace and Bruce Wagner, both of whom were given a certain leeway, were sometimes, according to Wallace, required to have their writing vetted by Donner-Grau. Jennings and Wallace also report that Castaneda directed the inner circle’s sex lives in great detail.

The most difficult part, Wallace believes, was that you never knew where you stood. “He’d pick someone, crown them, and was as capable of kicking them out in 48 hours as keeping them 10 years. You never knew. So there was always trepidation, a lot of jealousy.” Sometimes initiates were banished for obscure spiritual offenses, such as drinking cappuccino (which Castaneda himself guzzled in great quantities). They’d no longer be invited to the compound. Phone calls wouldn’t be returned. Having been allowed for a time into a secret, magical family, they’d be abruptly cut off. For some, Wallace believes, this pattern was highly traumatic. “In a weird way,” she said, “the worst thing that can happen is when you’re loved and loved and then abused and abused, and there are no rules, and the rules keep changing, and you can never do right, but then all of a sudden they’re kissing you. That’s the most crazy-making behavioral modification there is. And that’s what Carlos specialized in; he was not stupid.”

Whether disciples were allowed to stay or forced to leave seems often to have depended on the whims of a woman known as the Blue Scout. Trying to describe her power, Ward recalled a “Twilight Zone” episode in which a little boy could look at people and make them die. “So everyone treated him with kid gloves,” she said, “and that’s how it was with the Blue Scout.” She was born Patricia Partin and grew up in LaVerne, Calif., where, according to Jennings, her father had been in an accident that left him with permanent brain damage. Partin dropped out of Bonita High her junior year. She became a waitress, and, at 19, married an aspiring filmmaker, Mark Silliphant, who introduced her to Castaneda in 1978. Within weeks of their marriage she left Silliphant and went to live with Castaneda. She paid one last visit to her mother; in keeping with the nagual’s instructions, she refused to be in a family photograph. For the rest of her life, she never spoke to her mother again.

Castaneda renamed Partin Nury Alexander. She was also “Claude” as well as the Blue Scout. She soon emerged as one of his favorites (Castaneda officially adopted her in 1995). Followers were told he’d conceived her with Tiggs in the nagual. He said she had a very rare energy; she was “barely human” — high praise from Castaneda. Partin, a perpetual student at UCLA and an inveterate shopper at Neiman Marcus, was infantilized. In later years, new followers would be assigned the task of playing dolls with her.

In the late ’80s, perhaps because book sales had slowed, or perhaps because he no longer feared media scrutiny, Castaneda sought to expand. Jennings believes he may have been driven by a desire to please Partin. Geuter confirms that Castaneda told followers that the Blue Scout had talked him into starting Cleargreen. But she also suggests another motivation. “He was thinking about what he wanted for the rest of his life,” Geuter told me. “He always talked about ‘going for the golden clasp.’ He wanted to finish with something spectacular.”

Castaneda investigated the possibility of incorporating as a religion, as L. Ron Hubbard had done with Scientology. Instead, he chose to develop Tensegrity, which, Jennings believes, was to be the means through which the new faith would spread. Tensegrity is a movement technique that seems to combine elements of a rigid version of tai chi and modern dance. In all likelihood the inspiration came from karate devotees Donner-Grau and Abelar, and from his years of lessons with martial arts instructor Howard Lee. Documents found by Geuter show him discussing a project called “Kung Fu Sorcery” with Lee as early as 1988. The more elegant “Tensegrity” was lifted from Buckminster Fuller, for whom it referred to a structural synergy between tension and compression. Castaneda seems to have just liked the sound of it.

A major player in promoting Tensegrity was Wagner, whose fifth novel, “The Chrysanthemum Palace,” was a finalist for the PEN/Faulkner prize (his sixth, “Memorial,” was recently released by Simon and Schuster). Wagner hadn’t yet published his first novel when he approached Castaneda in 1988 with the hope of filming the don Juan books. Within a few years, according to Jennings and Wallace, he became part of the inner circle. He was given the sorceric name Lorenzo Drake — Enzo for short. As the group began to emerge from the shadows, holding seminars in high school auditoriums and on college campuses, Wagner, tall, bald and usually dressed in black, would, according to Geuter and Wallace, act as a sort of bouncer, removing those who asked unwanted questions. (Wagner declined requests for an interview.) In 1995 Wagner, who’d previously been wed to Rebecca De Mornay, married Tiggs. That same year his novel “I’m Losing You” was chosen by the New York Times as a notable book of the year. John Updike, in the New Yorker, proclaimed that Wagner “writes like a wizard.”

In the early ’90s, to promote Tensegrity, Castaneda set up Cleargreen, which operated out of the offices of “Rugrats” producer and Castaneda agent (and part-time sorcerer) Tracy Kramer, a friend of Wagner’s from Beverly Hills High. Although Castaneda wasn’t a shareholder, according to Geuter, “he determined every detail of the operation.” Jennings and Wallace confirm that Castaneda had complete control of Cleargreen. (Cleargreen did not respond to numerous inquiries from Salon.) The company’s official president was Amalia Marquez (sorceric name Talia Bey), a young businesswoman who, after reading Castaneda’s books, had moved from Puerto Rico to Los Angeles in order to follow him.

At Tensegrity seminars, women dressed in black, the “chacmools,” demonstrated moves for the audience. Castaneda and the witches would speak and answer questions. Seminars cost up to $1,200, and as many as 800 would attend. Participants could buy T-shirts that read “Self Importance Kills — Do Tensegrity.” The movements were meant to promote health as well as help practitioners progress as warriors. Illness was seen as a sign of weakness. Wallace recalls the case of Tycho, the Orange Scout (supposedly the Blue Scout’s sister). “She had ulcerative colitis,” Wallace told me. “She was trying to keep it a secret because if Carlos knew you were sick he’d punish you. If you went for medical care, he’d kick you out.” Once Tycho’s illness was discovered, Wallace said, Tycho was expelled from the group.

– – – – – – – – – – – –

If Castaneda’s early books drew on Buddhism and phenomenology, his later work seemed more indebted to science fiction. But throughout, there was a preoccupation with meeting death like a warrior. In the ’90s, Castaneda told his followers that, like don Juan, he wouldn’t die — he’d burn from within, turn into a ball of light, and ascend to the heavens.

In the summer of 1997, he was diagnosed with liver cancer. Because sorcerers weren’t supposed to get sick, his illness remained a tightly guarded secret. While the witches desperately pursued traditional and alternative treatments, the workshops continued as if nothing was wrong (although Castaneda often wasn’t there). One of the witches, Abelar, flew to Florida to inspect yachts. Geuter, in notes taken at the time, wondered, “Why are they buying a boat? … Maybe Carlos wants to leave with his group, and disappear unnoticed in the wide-open oceans.”

No boats were purchased. Castaneda continued to decline. He became increasingly frail, his eyes yellow and jaundiced. He rarely left the compound. According to Wallace, Tiggs told her the witches had purchased guns. While the nagual lay bedridden with a morphine drip, watching war videos, the inner circle burned his papers. A grieving Abelar had begun to drink. “I’m not in any danger of becoming an alcoholic now,” she told Wallace. “Because I’m leaving, so — it’s too late.” Wallace writes: “She was telling me, in her way, that she planned to die.”

Wallace also recalls a conversation with Lundahl, the star of the Tensegrity videos and one of the women who disappeared: “If I don’t go with him, I’ll do what I have to do,” Wallace says Lundahl told her. “It’s too late for you and me to remain in the world — I think you know exactly what I mean.”

In April 1998, Geuter filmed the inner circle packing up the house. The next week, at age 72, Castaneda died. He was cremated at the Culver City mortuary. No one knows what became of his ashes. Within days, Donner-Grau, Abelar, Partin, Lundahl and Marquez had their phones disconnected and vanished. A few weeks later, Partin’s red Ford Escort was found abandoned in Death Valley’s Panamint Dunes.

Even within the inner circle, few knew that Castaneda was dead. Rumors spread. Many were in despair: The nagual hadn’t “burned from within.” Jennings didn’t learn until two weeks later, when Tiggs called to tell him Castaneda was “gone.” The witches, she said, were “elsewhere.”

In a proposal for a biography of Castaneda, a project Jennings eventually chose not to pursue, he writes that Tiggs “also told me she was supposed to have ‘gone with them,’ but ‘a non-decision decision’ kept me here.” Meanwhile, the workshops continued. “Carol also banned mourning within Cleargreen,” Jennings writes, “so its members hid their grief, often drowning it in alcohol or drugs.” Wallace, too, recalls a lot of drug use: “I don’t know if they tried to OD so much as to ‘get there.’ Get to Carlos.” Jennings himself drove to the desert and thought about committing suicide.

The media didn’t learn of Castaneda’s death for two months. When the news became public, Cleargreen members stopped answering their phones. They soon placed a statement, which Jennings says was written by Wagner, on their Web site: “For don Juan, the warrior was a being … who embarks, when the time comes, on a definitive journey of awareness, ‘crossing over to total freedom’ … warriors can keep their awareness, which is ordinarily relinquished, at the moment of dying. At the moment of crossing, the body in its entirety is kindled with knowledge … Carlos Castaneda left the world the same way that his teacher, don Juan Matus did: with full awareness.”

Many obituaries had a curious tone; the writers seemed uncertain whether to call Castaneda a fraud. Some expressed a kind of nostalgia for an author whose work had meant so much to so many in their youth. Korda refused comment. De Mille, in an interview with filmmaker Ralph Torjan, expressed a certain admiration. “He was the perfect hoaxer,” he told Torjan, “because he never admitted anything.”

Jennings, Wallace and Geuter believe the missing women likely committed suicide. Wallace told me about a phone call to Donner-Grau’s parents not long after the women disappeared. Donner-Grau had been one of the few allowed to maintain contact with her family. “They were weeping,” Wallace said, “because there was no goodbye. They didn’t know what had happened. This was after decades of being in touch with them.”

Castaneda’s will, executed three days before his death, leaves everything to an entity known as the Eagle’s Trust. According to Jennings, who obtained a copy of the trust agreement, the missing women have a considerable amount of money due to them. Deborah Drooz, the executor of Castaneda’s estate, said she has had no contact with the women. She added that she believes they are still alive.

Jennings believes Castaneda knew they were planning to kill themselves. “He used to talk about suicide all the time, even for minor things,” Jennings told me. He added that Partin was once sent to identify abandoned mines in the desert, which could be used as potential suicide sites. (There’s an abandoned mine not far from where her remains were found.) “He regularly told us he was our only hope,” Jennings said. “We were all supposed to go together, ‘make the leap,’ whatever that meant.” What did Jennings think it meant? “I didn’t know fully,” he said. “He’d describe it in different ways. So would the witches. It seemed to be what they were living for, something we were being promised.”

The promise may have been based on the final scene in “Tales of Power,” in which Carlos leaps from a cliff into the nagual. The scene is later retold in varying versions. In his 1984 book, “The Fire From Within,” Castaneda wrote: “I didn’t die at the bottom of that gorge — and neither did the other apprentices who had jumped at an earlier time — because we never reached it; all of us, under the impact of such a tremendous and incomprehensible act as jumping to our deaths, moved our assemblage points and assembled other worlds.”

Did Castaneda really believe this? Wallace thinks so. “He became more and more hypnotized by his own reveries,” she told me. “I firmly believe Carlos brainwashed himself.” Did the witches? Geuter put it this way: “Florinda, Taisha and the Blue Scout knew it was a fantasy structure. But when you have thousands of eyes looking back at you, you begin to believe in the fantasy. These women never had to answer to the real world. Carlos had snatched them when they were very young.”

Wallace isn’t sure what the women believed. Because open discussion of Castaneda’s teachings was forbidden, it was impossible to know what anyone really thought. However, she told me, after living so long with Castaneda, the women may have felt they had no choice. “You’ve cut off all your ties,” she said. “Now you’re going to go back after all these decades? Who are you going to go be with? And you feel that you’re not one of the common herd anymore. That’s why they killed themselves.”

On its Web site, Cleargreen maintains that the women didn’t “depart.” However, “for the moment they are not going to appear personally at the workshops because they want this dream to take wings.”

Remarkably, there seems to have been no investigation into at least three of the disappearances. Except for Donner-Grau, they’d all been estranged from their families for years. For months after they vanished, none of the other families knew what had happened. And so, according to Geuter, no one reported them missing. Salon attempted to locate the three missing women, relying on public records and phone calls to their previous residences, but discovered no current trace of them. The Los Angeles Police Department and the FBI confirm that there’s been no official inquiry into the disappearances of Donner-Grau, Abelar and Lundahl.

There is, however, a file open in the Marquez case. This is due to the tireless efforts of Luis Marquez, who told Salon that he first tried to report his sister missing in 1999. But the LAPD, he said, repeatedly ignored him. A year later, he and his sister Carmen wrote a letter to the missing-persons unit; again, no response. According to Marquez, it wasn’t until Partin’s remains were identified that the LAPD opened a file on Amalia. “To this day,” he told me, “they still refuse to ask any questions or visit Cleargreen.” His own attempts to get information from Cleargreen have been fruitless. According to Marquez, all he’s been told is that the women are “traveling.” Detective Lydia Dillard, assigned to the Marquez case, said that because this is an open investigation, she couldn’t confirm whether anyone from Cleargreen had been interviewed.

In 2002, a Taos, N.M., woman, Janice Emery, a Castaneda follower and workshop attendee, jumped to her death in the Rio Grande gorge. According to the Santa Fe New Mexican, Emery had a head injury brought on by cancer. One of Emery’s friends told the newspaper that Emery “wanted to be with Castaneda’s people.” Said another: “I think she was really thinking she could fly off.” A year later, a skeleton was discovered near the site of Partin’s abandoned Ford. The Inyo County sheriff’s department suspected it was hers. But, due to its desiccated condition, a positive identification couldn’t be made until February 2006, when new DNA technology became available.

Wallace recalls how Castaneda had told Partin that “if you ever need to rise to infinity, take your little red car and drive it as fast as you can into the desert and you will ascend.” And, Wallace believes, “that’s exactly what she did: She took her little red car, drove it into the desert, didn’t ascend, got out, wandered around and fainted from dehydration.”

Partin’s death and the disappearance of the other women aren’t Castaneda’s entire legacy. He’s been acknowledged as an important influence by figures ranging from Deepak Chopra to George Lucas. Without a doubt, Castaneda opened the doors of perception for numerous readers, and many workshop attendees found the experience deeply meaningful. There are those who testify to the benefits of Tensegrity. And even some of those who are critical of Castaneda find his teachings useful. “He was a conduit. I wanted answers to the big questions. He helped me,” Geuter said. But for five of his closest companions, his teachings — and his insistence on their literal truth — may have cost them their lives.

Long after Castaneda had been discredited in academia, Korda continued to insist on his authenticity. In 2000, he wrote: “I have never doubted for a moment the truth of his stories about don Juan.” Castaneda’s books have been profitable for Simon and Schuster, and according to Korda, were for many years one of the props on which the publisher rested. Castaneda might have achieved some level of success if his books had been presented, as James Redfield’s “Celestine Prophecy” is, as allegorical fiction. But Castaneda always insisted he’d made nothing up. “If he hadn’t presented his stories as fact,” Wallace told me, “it’s unlikely the cult would exist. As nonfiction, it became impossibly more dangerous.”

To this day, Simon and Schuster stands by Korda’s position. When asked whether, in the face of overwhelming evidence to the contrary, the publisher still regarded Castaneda’s books as nonfiction, Adam Rothenberg, the vice president for corporate communication, replied that Simon and Schuster “will continue to publish Castaneda as we always have.” Tensegrity classes are still held around the world. Workshops were recently conducted in Mexico City and Hanover, Germany. Wagner’s videos are still available from Cleargreen. According to the terms of Castaneda’s will, book royalties still help support a core group of acolytes. On Simon and Schuster’s Web site, Castaneda is still described as an anthropologist. No mention is made of his fiction.

The World's Worst Video Game?

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Howard Scott Warshaw has had many gigs over the years, but perhaps his most notable achievement was also a spectacular failure:

"I did the E.T. video game, the game that is widely held to be the worst video game of all time," he says.

E.T. The Extra-Terrestrial for the Atari 2600 was a commercial flop and a gaming disaster. Based loosely on Steven Spielberg's 1982 blockbuster of the same name, the game was a confusing mess that left players frustrated and disoriented. Millions of copies went unsold, and Atari ended up literally burying the game by dumping many surplus cartridges into a New Mexico landfill.

Within a year of E.T.'s release, the entire video game industry collapsed. Warshaw ultimately had to give up his career as a game designer. But the failure also laid the foundations for a new life.

To understand the makings of what has been described as the worst video game ever, you have to understand the mind of the man who made it. From the very start of life, Howard Scott Warshaw was in a hurry.

"When I was a kid, I wanted to be older. When I was older, I wanted to be an adult. I wanted to get out and I wanted to engage life," he says.

He wanted to get through school fast, make a quick, tidy fortune in business, and retire by 30.

To that end, he zipped through college, got a master's degree in computer engineering and headed to Silicon Valley. In 1981, he was hired at a new company called Atari. Atari was basically an early Silicon Valley startup. Its main product, the Atari 2600, was the first really popular video game console.

Warshaw's job was to design games. This was the era of games like Pong, in which users used black-and-white virtual paddles to push a small, square "ball" around a screen. It was pretty sedate.

Warshaw took a much more exciting approach to game design. At a time when graphics were primitive and in-game plots were nonexistent, he pushed to make his games feel more like movies.

"I tried to make every single thing on the screen move and pulse with color and sound," he says.

His first game was Yars' Revenge. The user played a mutant space fly, trying to kill a giant monster. It was unlike anything that had come before, and it was a runaway hit.

Howard Scott Warshaw was working at Atari in 1982 when Steven Spielberg asked him to design a video game adaptation of E.T. Courtesy of Dave Staugashide caption

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Courtesy of Dave Staugas

Warshaw quickly became one of the company's superstar programmers. When Atari got the rights to make the video game version of Steven Spielberg's first Indiana Jones movie, Raiders of the Lost Ark, they put him on the job. Now to put this in perspective, nobody had ever made a video game based on a movie. At 23, Warshaw was going to be the first programmer to ever attempt it.

It took him 10 months to design the Raiders game, write the code, get feedback, reprogram it and put it through quality control. When all that was finished, he showed Spielberg the final product.

"He looks up at me and he says, 'It's just like a movie. I feel like I just watched a movie,' " Warshaw recalls. "I thought, 'Oh my God! Steven Spielberg thinks my adventure game is just like a movie!' To me that was the ultimate compliment I could possibly receive on this work."

And here's where the trouble began. The next movie Spielberg made was E.T. Spielberg wanted a video game based on E.T. And he wanted Warshaw to program it.

"Spielberg had requested that I do E.T. So fine, I'm not going to argue," Warshaw says. "But what had happened, the negotiations for E.T. had run very long."

Atari and Spielberg haggled over rights and money until the end of July 1982. To get the game out in time for the Christmas holiday, Warshaw would have to build it from scratch in five weeks. The CEO of Atari called him directly.

"He goes, 'We need an E.T. game and we need it for September first, can you do it?' And I said, 'You bet I can. I absolutely can,'" he says.

"I don't know exactly what I was full of at the time, exactly, but whatever it was I was overflowing with it, and I believed I could pull it off. I mean the hubris of it!"

Warshaw wasn't the only one full of hubris. During this period, Atari was one of the fastest growing companies in America. Its profits were soaring and bonus checks were rolling in. Inside the headquarters were drugs and sex and booze.

"It was a ridiculous, excessive, sort of 'fall of Rome' kind of environment," he says.

And everyone there believed that nothing could stop them.

Warshaw had just 36 hours to come up with a concept for the game. In the movie, E.T. puts together a communicator he uses to "phone home." So Warshaw made that the basic plot of the game, too. The player as E.T. was to go around gathering parts for the phone.

"Another issue with me is that it's not enough that we're going to do something in five weeks. I wanted to do something that was a step up, not just an add-on," he says.

Warshaw created an elaborate world for the Atari E.T. to explore. The world was designed to wrap around on itself, so traveling in any direction eventually returned E.T. to his starting point.

In a still from the game, Elliott meets E.T. in a field of wells. The player must also collect Reese's Pieces, which are represented by small black dots throughout the game. Wikipediahide caption

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Wikipedia

Then Warshaw added lots of pits in the ground to hide parts of the phone in. (We'll get back to those pits later.)

Warshaw flew down to LA to show Spielberg the concept.

"I lay the whole thing out and here it is, and Spielberg looks at me and he goes, 'Couldn't you just do something like Pac-Man?'"

Warshaw was furious. "Just to give you an idea of how full of myself I was at that point. I'm sitting there with Steven Spielberg and I wanted to say, 'Well, gee, Steven couldn't you do something like The Day the Earth Stood Still?'"

In the end Spielberg signed off on the game's design. Warshaw went back to Silicon Valley. He had a game development system moved into his home so he could work on E.T. day and night.

"I would say workwise it was the hardest five weeks of my life," he says.

And in five, magical weeks, he took the blockbuster film E.T. and turned it into a horrible video game.

Here's the fundamental problem with E.T.: It's really confusing to play. The E.T. game character travels through a wraparound world that keeps returning players to the same screen again and again without explanation. The pits in the ground, in which E.T.'s phone is hidden, constantly trap the little alien. In the words of NPR's Gene Demby, who received a copy one Christmas in his youth, E.T. is the video-game equivalent of "purgatory."

Warshaw has a different way of explaining the game's problem: "There's a difference between frustration and disorientation," he says. "Video games are all about frustration. It's OK to frustrate a user. In fact, it's important to frustrate a user. But you don't want to disorient the user."

At first, Warshaw didn't know that he'd made a dud. Sales around the holidays were strong. E.T. was at the top of the charts. But then, in the halls at Atari, people started coming up to him and saying things that made it clear E.T. had flopped.

"It hurt," Warshaw recalls. "I mean it hurt to hear that people aren't liking my game."

At the same time Warshaw's game flopped, Atari was running into real trouble. The company's owners were making bad business deals. Programmers like Warshaw were making bad games. And just as quickly as it had risen, Atari was falling. The CEO was fired, and the company had to lay off hundreds of employees.

Soon, Warshaw was out of a job. "Atari was the world to me," he says. "You want to talk about a failure. The failure of E.T. was really nothing at that time in my life compared to the loss of Atari as a workplace."

But when it came to failure, Warshaw was just getting started. Atari had made him a millionaire, but he squandered it on bad investments. And then the IRS came after him for back taxes. Warshaw hit bottom.

"Until one day, I really had a sit-down with myself, and I said, 'You know, the IRS can only take my money. That's really all they can do. If I give them my happiness, that's on me.' "

And he began a long, slow journey toward finding that happiness again. He went from job to job: computers, videography, real estate. Some gigs were better than others, but none compared to his time at Atari. The months stretched into years, and eventually more than a decade. And then one day, he was talking to his girlfriend at the time and she asked him, "What do you really want to do?"

"I said, 'Well, I'd be a therapist.' I mean, I didn't even think for a second, I knew exactly what I wanted to do," he says.

Warshaw and his wife, Sherri Warshaw, earlier this year. Courtesy of Howard Scott Warshawhide caption

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Courtesy of Howard Scott Warshaw

Therapy. It made perfect sense. Silicon Valley was booming, except instead of video games it was smartphones and apps. Startups were failing. People's careers were crashing and burning. And after everything he'd been through, Warshaw knew he was the guy who could help.

"I have been there; I do know what it's like. I have succeeded and I've failed and I've lost it, and I've had it and I've lost it. I've seen all this go. I can help people really understand and relate and find a way around and through it," he says.

Warshaw got his license, and today he calls himself the Silicon Valley Therapist. His clients are a lot like he was back in the day: young, ambitious and rushing ahead. Business is good.

This story is the third in a four-part series on the experience of failure and how people deal with it. It was developed in NPR's Story Lab. Nicholas DePrey created original music for the series.

Kerbal Space Program Acquired by Take-Two Interactive

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Hello everyone,

We have very exciting news to share with the KSP community today: Take-Two Interactive has purchased Kerbal Space Program. The important thing to know is that this big news doesn’t change much for the KSP community. Squad and the current development team is still here and we’re hard at work on KSP and its future updates, but now we are fortunate enough to do so with the help of an experienced publisher like Take-Two, and we couldn’t be more excited and happy to see where our conjoint collaboration will take KSP forward.

Right now, we’re still focused on the Kerbal Space Program: Making History Expansion and we’ll continue to keep you updated on our progress. And yes, we’re keeping our promise of free DLC for everyone who purchased KSP through April 2013! We’re continuing to work closely with Blitworks on the updated version of KSP for consoles, which will be available on the Xbox and PSN digital stores when it is complete. This will be a free update for anyone who already owns KSP on Xbox or PS4. We can’t wait for you to play what we’ve been working on in the coming months!

This is a very exciting time for KSP and the Community, and we hope you’re as thrilled as we are. The team at Take-Two are big fans of KSP, who have been persistently knocking on our door trying to work with us for a long time. They share your passion for the game and we’re really eager to see what Squad and Take-Two can do together for Kerbal Space Program moving forward!

Happy launchings!
-The KSP Development Team


Uber Posts $708M Loss as Finance Head Leaves

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Uber Technologies Inc. said its head of finance is leaving as the ride-hailing company reported continued big losses despite increasing revenue, adding to an exodus of top officials and setting the stage for a second major executive search.

The ride-hailing company on Wednesday told The Wall Street Journal that first-quarter revenue was $3.4 billion, up 18% from the fourth quarter. Its loss, excluding employee stock compensation and...

Silk Road founder loses appeal

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On Wednesday, an appellate court shot down Silk Road creator Ross Ulbricht’s effort to avoid spending the rest of his life behind bars. Two years ago, Ulbricht was sentenced to life in prison for his role in running the dark web exchange, best known as a once-thriving online marketplace for drug transactions.

Ulbricht was sentenced in 2015 after a court found that he operated Silk Road under the pseudonym “Dread Pirate Roberts.” Among other lines of defense, Ulbricht’s legal team argued that IP addresses central to the case were gathered without a warrant and violated his Fourth Amendment rights, though the appeals court ultimately did not rule in his favor.

Ulbricht’s particularly harsh sentence for nonviolent crimes is largely due to the massive scale at which the Silk Road facilitated the drug trade. His charges included money laundering, conspiracy to traffic narcotics and a “kingpin” charge generally withheld for leaders of major drug cartels.

Featured Image: paul geilfuss/Shutterstock

Fireflies

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Like Christmas lights gently floating in midair, fireflies always add a little bit of magic to the forests they live in.

CLICK & DRAG
to create some
firefly chaos →

But some firefly species add even more magic. In Southeast Asia, if you go out to the riverbank deep in the night, you'll be treated to this stunning lightshow – courtesy of the Thailand firefly:

A whole mangrove forest, lighting up all at once, plunging into darkness, then lighting up all again – in near-perfect synchrony. How do thousands of fireflies coordinate with each other? Who is the conductor of this silent symphony?

This was a mystery for nearly a century, and in 1992, a team of US scientists set out to solve it. Sadly, but not surprisingly, the press mocked them – “Govt. Blows Your Tax $$ to Study Fireflies in Borneo: Not a Bright Idea!” read one tabloid. Undeterred, the scientists pressed on, cameras and calculators in hand.

So, how do thousands of fireflies pick a leader to follow, a maestro to keep their flashing in time? The answer, the scientists found, is simple:

They don't.

Each firefly has its own individual internal clock, and every time the clock “strikes twelve”, it flashes.

And instead of synchronizing their clocks to a central leader, each firefly does the following:

Step 1: when you see a nearby firefly flash, nudge your clock a little bit forward.

Step 2: that's it.

Can such a small, short-ranged interaction really cause an entire forest-ful of fireflies to flash in synchronous harmony? Only one way to find out...



Wait. Watch carefully.

What do you see?

At first, not much. The fireflies still seem to be flashing without pattern.

But after a while, you may notice small “patches” of fireflies firing together – but these individual “patches” are still out of sync.

After a bit longer, you start seeing fireflies performing a “wave”, like excited fans in the stands during a baseball game.

Finally, all but a few fireflies are flashing together – and eventually, even these laggards join in the collective dance.

What's more amazing? If you disrupt these fireflies by causing some chaos...

CLICK & DRAG
to mess up these
fireflies, again →

...yes, it may cause them to divide for a moment, but slowly and surely, they shall collect themselves again, and flash as one.

Here's a few more buttons & sliders you can use, to play around with these virtual fireflies:



And that's the secret behind our fireflies' magic trick:

small-scale
interactions

large-scale
organization

As it turns out, fireflies aren't the only things that synchronize themselves from the bottom up. Your neurons create brain waves. Your heart's pacemaker cells fire in sync. Even a bunch of lifeless metronomes on a wobbly platform will start to march together. On top of all that, understanding self-synchrony has helped us build better lasers, computers, and communications technology!

And to think, the mathematics of self-synchronizing systems was discovered in part by a few scientists who just really loved fireflies. Looks like calling their project “Not a Bright Idea” was not a bright idea.

. . .

You float along, softly, in silence, occasionally punctuating the darkness with a small dot of bright light. By yourself, there's not much to see.

But whenever you shine, you inspire those close to you to shine too, a little bit sooner than they otherwise would have. And those close to you, in turn, inspire those close to them.

And so on, and so on.

First, a few small groups start flashing together. Then, a wave of light sweeps across the swarm. Finally, you're all dazzling together, a brilliant beacon, all in harmony, in tandem – in synchrony.

What small-scale interaction will you make today, little firefly?

Build an 8-Bit Computer from Scratch

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I built a programmable 8-bit computer from scratch on breadboards using only simple logic gates. I documented the whole project in a series of YouTube videos and on this web site. For an introduction:

Background

If you’re interested in seeing the computer in action to get a sense of what it can do, check out these videos:

If you want to dive into the details of how the computer works and understand it from first principles, but are a little unsure of how transistors and logic gates work (or just want a refresher), here’s a few videos to serve as an introduction:

Computer modules

The computer is composed of several modules, each of which performs just a few basic functions. Check out these posts for more detailed information on building each module:

Complete parts list

Here’s a complete parts list of everything I used to build the breadboard computer. The total cost works out to roughly $150-$200 USD depending on what breadboards you use and how much you end up paying for shipping.

There’s no right way to do this project. There are tons of substitutions and other approaches which will work just as well (or better), so if you want to build something similar and can’t find all the parts, try to figure out what the missing part does and find a different way of doing it. It might not work the first time, but you’ll learn a ton from trying to figure out why.

QuantityDescriptionApprox. cost eachApprox. total costSourcesModules
14Breadboard$3 - $8$36 - $96AmazonAll
122 AWG Solid Tinned-Copper Hook-Up Wire$18.00$18.00AmazonJamecoAll
91kΩ resistor$0.04$0.36DigikeyAmazonCLK, RAM, OUT
810kΩ resistor$0.04$0.32DigikeyAmazonBUS
2100kΩ resistor$0.04$0.08DigikeyAmazonCLK, OUT
8470Ω resistor$0.04$0.32DigikeyAmazonBUS
11MΩ resistor$0.04$0.04DigikeyAmazonCLK
11MΩ potentiometer$2.50$2.50DigikeyAmazonCLK
60.01µF capacitor$0.15$0.90DigikeyAmazonCLK, RAM, OUT
20.1µF capacitor$0.18$0.36DigikeyAmazonCLK
11µF capacitor$0.71$0.71DigikeyAmazonCLK
4555 timer IC$0.41$1.64DigikeyEbayCLK, OUT
174LS00 (Quad NAND gate)$0.50$0.50DigikeyEbayRAM
574LS04 (Hex inverter)$0.50$2.50DigikeyEbayCLK, RAM, CONT
274LS08 (Quad AND gate)$0.50$1.00DigikeyEbayCLK, OUT
174LS32 (Quad OR gate)$0.50$0.50DigikeyEbayCLK
174LS76 (Dual JK flip-flop)$2.00$2.00EbayOUT
274LS86 (Quad XOR gate)$0.50$1.00DigikeyEbayALU
174LS138 (3-to-8 line decoder)$0.50$0.50EbayCONT
174LS139 (Dual 2-line to 4-line decoder)$0.50$0.50EbayOUT
474LS157 (Quad 2-to-1 line data selector)$0.50$2.00EbayRAM
474LS161 (4-bit synchronous binary counter)$0.50$2.00EbayPC, CONT
774LS173 (4-bit D-type register)$1.00$7.00EbayREG, RAM
274LS189 (64-bit random access memory)$1.50$3.00EbayRAM
674LS245 (Octal bus transceiver)$0.50$3.00EbayREG, ALU, RAM, PC
174LS273 (Octal D flip-flop)$0.50$0.50EbayOUT
274LS283 (4-bit binary full adder)$2.00$4.00EbayALU
428C16 EEPROM$6.00$24.00EbayOUT, CONT
2Double-throw toggle switch$3.80$7.60AmazonCLK, RAM
2Momentary 6mm tact switch$2.50$5.00AmazonCLK, RAM
18-position DIP switch$0.50$0.50AmazonEbayRAM
14-position DIP switch$0.50$0.50EbayRAM
41Red LED$0.05$2.05AmazonEbayBUS, REG, ALU, RAM
20Yellow LED$0.05$1.00AmazonEbayREG, RAM, CONT
11Green LED$0.05$0.55AmazonEbayRAM, PC, CONT
22Blue LED$0.05$1.10AmazonEbayCLK, REG, CONT
4Common cathode 7-segment display$0.75$3.00AmazonEbayOUT

Additionally, I used an Arduino Nano and two 74HC595 shift registers to build a simple EEPROM programmer to program the 28C16 EEPROMs used in the output module and control logic.

Breadboards

A note on breadboards: You can get them from lots of places for different prices. The best quality I’ve found is the BB830 by BusBoard Prototype Systems. I get them on Amazon, but they’re not cheap. (If you’re paying less than $7-8 USD each, you’re probably getting a fake.)

Lower quality, cheaper breadboards will probably work just fine (and save a bunch of money if you’re buying ~12 of them). The biggest differences include inadequate funneling on each hole, making it harder to properly insert components (this can vary a lot, from not a big deal to useless); inconsistent coloring (i.e., several breadboards, even ordered at the same time, are different shades of white); confusing labeling (e.g., numbers not lining up with holes); and warping (i.e., the breadboard doesn’t sit completely flat). Most of those aren’t deal-breakers, and if something doesn’t work right, look on the bright side: you get to troubleshoot it and learn more 🙂

Ohio Sues 5 Major Drug Companies For 'Fueling Opioid Epidemic'

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Purdue Pharma, which makes OxyContin, defended its efforts to combat opioid abuse after it was named in the Ohio suit. Toby Talbot/APhide caption

toggle caption
Toby Talbot/AP

The state of Ohio has sued five major drug manufacturers for their role in the opioid epidemic. In the lawsuit filed Wednesday, state Attorney General Mike DeWine alleges these five companies "helped unleash a health care crisis that has had far-reaching financial, social, and deadly consequences in the State of Ohio."

Named in the suit are:

  • Purdue Pharma
  • Endo Health Solutions
  • Teva Pharmaceutical Industries and subsidiary Cephalon
  • Johnson & Johnson and subsidiary Janssen Pharmaceuticals
  • Allergan

The lawsuit” only the second such suit filed by a state, after Mississippi did so earlier this year ” accuses the companies of engaging in a sustained marketing campaign to downplay the addiction risks of the prescription opioid drugs they sell and to exaggerate the benefits of their use for health problems such as chronic pain.

Or, as DeWine's office put it in a press release Wednesday, the "lawsuit alleges that the drug companies engaged in fraudulent marketing regarding the risks and benefits of prescription opioids which fueled Ohio's opioid epidemic."

"We believe that the evidence will show that these pharmaceutical companies purposely misled doctors about the dangers connected with pain meds that they produced, and that they did so for the purpose of increasing sales," DeWine tells NPR's All Things Considered. "And boy, did they increase sales."

By the late 1990s, DeWine's suit says, each of the five companies had embarked on a persuasion scheme targeting doctors, whom the state positions as victims of systematic misinformation:

"Defendants persuaded doctors and patients that what they had long known ” that opioids are addictive drugs, unsafe in most circumstances for long-term use ” was untrue, and quite the opposite, that the compassionate treatment of pain required opioids."

Asked by NPR's Robert Siegel whether doctors had a role of their own in overprescribing potentially dangerous medication, DeWine says more fault rests with a culture created by these companies.

"This was not something that the pharmaceutical companies just woke up some day and just started to do a little bit of it," he says.

"I mean, there was a concerted effort for an extended number of years to really pound this into the heads of doctors. And when you're told something time and time and time again and there's a lot of advertising that is being spent, yeah, it takes a while to turn that around."

In a statement provided to the Cleveland Plain Dealer, a spokeswoman for Janssen, one of the defendants, called the lawsuit "legally and factually unfounded":

"Janssen has acted appropriately, responsibly and in the best interests of patients regarding our opioid pain medications, which are FDA-approved and carry FDA-mandated warnings about the known risks of the medications on every product label."

Purdue Pharma, another defendant, told The Plain Dealer that it has been involved in seeking to combat widespread opioid addiction:

"OxyContin accounts for less than 2 percent of the opioid analgesic prescription market nationally, but we are an industry leader in the development of abuse-deterrent technology, advocating for the use of prescription drug monitoring programs and supporting access to Naloxone ” all important components for combating the opioid crisis."

And that crisis shows few signs of ebbing soon.

As All Things Considered notes, the state of Ohio estimates some 200,000 people within its borders are addicted to opioids ” a number roughly the same as Akron's entire population.

In his release Wednesday, DeWine says he filed the suit in Ross County for a reason: "Southern Ohio was likely the hardest hit area in the nation by the opioid epidemic."

Paul Allen's new rocket-launching plane

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Paul Allen's intriguing launch company, Vulcan Aerospace, has gone relatively quiet in recent years, and questions about the venture's viability have been increasing. But on Wednesday, the cofounder of Microsoft shared a new photo of the company's Stratolaunch airplane—the largest in the world—and it seems the company is moving forward.

The new plane is, in a word, bigly. The aircraft has 385-foot wingspan and, powered by six Pratt & Whitney engines used on Boeing 747 aircraft, has a maximum takeoff weight of 1.3 million pounds. The Stratolaunch's wingspan is the largest in history, blowing away the previous record-holder (Howard Hughes' Spruce Goose) by 65 feet. Vulcan Aerospace says its Stratolaunch airplane will have an operational range of 2,000 nautical miles. Serving as a reusable first stage for rocket launches, the Stratolaunch system will be capable of delivering payloads to multiple orbits and inclinations in a single mission.

Recently—perhaps on Wednesday, but the date was not made clear—the company moved the Stratolaunch aircraft out of its hangar at the Mojave Air & Space Port in the eponymous California desert. This was first time it had been moved outdoors, and Allen said the purpose was to conduct a "fueling test." This event marked the completion of the construction phase, the company later said, and the beginning of ground and eventually flight tests.

The Stratolaunch system is part of Allen's plan to lower the cost of access to space through reusability. Vulcan has released few details about the launcher's capacity, but in October it did announce a partnership with Orbital ATK by which the Dulles, Virginia-based company would provide "multiple" Pegasus XL air-launch vehicles for use with the Stratolaunch aircraft. These rockets can launch small satellites weighing up to 1,000 pounds into low Earth orbit. With this concept and capacity, Stratolaunch is competing with companies such as Virgin Orbit, which plans to launch rockets from a modified Boeing 747-400.

In his memoir Idea Man, Allen wrote about being obsessed with rocketry ever since he was a kid. He read Robert Heinlein and was entranced by Apollo, and he knew the names of the Mercury 7 astronauts by heart. As a child, Allen made elaborate drawings of rockets and spacemen and dreamed of building rockets to explore Mars.

“Other enthusiasms came and went, but my obsession with rocketry endured,” he wrote. “After Apollo, NASA shifted to unmanned probes. Space lost its cachet, but it never lost my interest." This week, the cachet is back.

Listing image by Stratolaunch Systems Corporation

Is the U.S. Education System Producing a Society of “Smart Fools”?

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BOSTON—At last weekend’s annual meeting of the Association for Psychological Science (APS) in Boston, Cornell University psychologist Robert Sternberg sounded an alarm about the influence of standardized tests on American society. Sternberg, who has studied intelligence and intelligence testing for decades, is well known for his “triarchic theory of intelligence,” which identifies three kinds of smarts: the analytic type reflected in IQ scores; practical intelligence, which is more relevant for real-life problem solving; and creativity. Sternberg offered his views in a lecture associated with receiving a William James Fellow Award from the APS for his lifetime contributions to psychology. He explained his concerns to Scientific American.

[An edited transcript of the interview follows.]

In your talk, you said that IQ tests and college entrance exams like the SAT and ACT are essentially selecting and rewarding “smart fools”—people who have a certain kind of intelligence but not the kind that can help our society make progress against our biggest challenges. What are these tests getting wrong?
Tests like the SAT, ACT, the GRE—what I call the alphabet tests—are reasonably good measures of academic kinds of knowledge, plus general intelligence and related skills. They are highly correlated with IQ tests and they predict a lot of things in life: academic performance to some extent, salary, level of job you will reach to a minor extent—but they are very limited. What I suggested in my talk today is that they may actually be hurting us. Our overemphasis on narrow academic skills—the kinds that get you high grades in school—can be a bad thing for several reasons. You end up with people who are good at taking tests and fiddling with phones and computers, and those are good skills but they are not tantamount to the skills we need to make the world a better place.

What evidence do you see of this harm?
IQ rose 30 points in the 20th century around the world, and in the U.S. that increase is continuing. That’s huge; that’s two standard deviations, which is like the difference between an average IQ of 100 and a gifted IQ of 130. We should be happy about this but the question I ask is: If you look at the problems we have in the world today—climate change, income disparities in this country that probably rival or exceed those of the gilded age, pollution, violence, a political situation that many of us never could have imaged—one wonders, what about all those IQ points? Why aren’t they helping?

What I argue is that intelligence that’s not modulated and moderated by creativity, common sense and wisdom is not such a positive thing to have. What it leads to is people who are very good at advancing themselves, often at other people’s expense. We may not just be selecting the wrong people, we may be developing an incomplete set of skills—and we need to look at things that will make the world a better place.

Do we know how to cultivate wisdom?
Yes we do. A whole bunch of my colleagues and I study wisdom. Wisdom is about using your abilities and knowledge not just for your own selfish ends and for people like you. It’s about using them to help achieve a common good by balancing your own interests with other people’s and with high-order interests through the infusion of positive ethical values.

You know, it’s easy to think of smart people but it’s really hard to think of wise people. I think a reason is that we don’t try to develop wisdom in our schools. And we don’t test for it, so there’s no incentive for schools to pay attention.

Can we test for wisdom and can we teach it?
You learn wisdom through role-modeling. You can start learning that when you are six or seven. But if you start learning what our schools are teaching, which is how to prepare for the next statewide mastery tests, it crowds out of the curriculum the things that used to be essential. If you look at the old McGuffey Readers, they were as much about teaching good values and good ethics and good citizenship as about teaching reading. It’s not so much about teaching what to do but how to reason ethically; to go through an ethical problem and ask: How do I arrive at the right solution?

I don’t always think about putting ethics and reasoning together. What do you mean by that?
Basically, ethical reasoning involves eight steps: seeing that there’s a problem to deal with (say, you see your roommate cheat on an assignment); identifying it as an ethical problem; seeing it as a large enough problem to be worth your attention (it’s not like he’s just one mile over the speed limit); seeing it as personally relevant; thinking about what ethical rules apply; thinking about how to apply them; thinking what are the consequences of acting ethically—because people who act ethically usually don’t get rewarded; and, finally, acting. What I’ve argued is ethical reasoning is really hard. Most people don’t make it through all eight steps.

If ethical reasoning is inherently hard, is there really less of it and less wisdom now than in the past?
We have a guy [representative-elect Greg Gianforte of Montana] who allegedly assaulted a reporter and just got elected to the U.S. House of Representatives—and that’s after a 30-point average increase in IQ. We had violence in campaign rallies. Not only do we not encourage creativity, common sense and wisdom, I think a lot of us don’t even value them anymore. They’re so distant from what’s being taught in schools. Even in a lot of religious institutions we’ve seen a lot of ethical and legal problems arise. So if you’re not learning these skills in school or through religion or your parents, where are you going to learn them? We get people who view the world as being about people like themselves. We get this kind of tribalism.

So where do you see the possibility of pushing back?
If we start testing for these broader kinds of skills, schools will start to teach to them, because they teach to the test. My colleagues and I developed assessments for creativity, common sense and wisdom. We did this with the Rainbow Project, which was sort of experimental when I was at Yale. And then at Tufts, when I was dean of arts and sciences, we started Kaleidoscope, which has been used with tens of thousands of kids for admission to Tufts. They are still using it. But it’s very hard to get institutions to change. It’s not a quick fix. Once you have a system in place, the people who benefit from it rise to the top and then they work very hard to keep it.

Looking at the broader types of admission tests you helped implement—like Kaleidoscope at Tufts, the Rainbow Project at Yale, or Panorama at Oklahoma State, is there any evidence that kids selected for having these broader skills are in any way different from those who just score high on the SAT?
The newly selected kids were different. I think the folks in admissions would say so, at least when we started. We admitted kids who would not have gotten in under the old system—maybe they didn’t quite have the test scores or grades. When I talk about this, I give examples, such as those who wrote really creative essays.

Has there been any longitudinal follow-up of these kids?
We followed them through the first year of college. With Rainbow we doubled prediction [accuracy] for academic performance, and with Kaleidoscope we could predict the quality of extracurricular performance, which the SAT doesn’t do.

Do you think the emphasis on narrow measures like the SAT or GRE is hurting the STEM fields in particular?
I think it is. I think it’s hurting everything. We get scientists who are very good forward incrementers—they are good at doing the next step but they are not the people who change the field. They are not redirectors or reinitiators, who start a field over. And those are the people we need.

Are you hopeful about change?
If one could convince even a few universities and schools to try to follow a different direction, others might follow. If you start encouraging a creative attitude, to defy the crowd and to defy the zeitgeist, and if you teach people to think for themselves and how what they do affects others, I think it’s a no-lose proposition. And these things can be taught and they can be tested.


Mathematics for Physics (2009) [pdf]

Mackinac Island Stone Skipping Competition

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Teaching a stone to fly

By Frank Bures

Published:

Pro stone skipper Max "Top Gun" Steiner practicing at Mackinac Island.
Pro stone skipper Max "Top Gun" Steiner practices at Mackinac Island

photo by ryan seitz. courtesy of the documentary skipping stones for fudge


Late one afternoon last summer, our family arrived at a campsite on the western shore of Lake Michigan. We had been driving all day, across Wisconsin on our way further east. The four of us—my wife and two daughters, ages 7 and 10—set up our tent, made dinner, then went down to the water. Two-foot waves were rolling across the lake, a taste of what lay ahead: We were going to the Mackinac Island Stone Skipping Competition—the oldest, most prestigious rock-skipping tournament in the United States, if not the world. Every Fourth of July, elite skippers (many former and current world-record holders) take turns throwing their stones into the waters where lakes Huron and Michigan meet, also known for having rolling, two-foot waves crashing on the beach.

I looked down, saw a decent skipping stone, and picked it up. My daughters were watching. The older one spoke up.

“Are you prepared for the fact that you probably won’t win?” she asked.

I threw the stone.

“Four,” she said. “But it caught a wave.”

My shoulders sagged.

“Don’t doubt yourself, Daddy!”

Her younger sister looked at her. “But you doubted him,” she said.

“That’s different.”

Prepared or not, I knew I had a knack for skipping. Some years earlier, I’d been driving through the mountains when I stopped at a roadside lake. The water was smooth as glass. I bent down, picked up a wide, flat stone, and sent it skimming across the water. It went on for what felt like forever, until it finally hit the rocky shore on the other side.

Behind me, a young boy spoke up.

“Wow,” he said. “You must be the world-champion rock skipper.”

I wasn’t. At least not yet. But I’d been skipping stones my whole life, ever since I was around my daughters’ ages, always getting better and better. There was almost nothing I loved better than the feeling of knowing—even before it hit the water—that you had a perfect throw, one that defies nature by making a stone both fly and float.

Mackinac, I had learned, was the place where such things were decided. These were my people—the ones who could spend hours on a beach looking for just the right stone, who would fill bags and boxes with skippers from secret locations, who would throw until their arm gave way, lost in the simple sorcery of stone skipping.

Pro stone skipper Kurt "Mountain Man" Steiner skipping stones across a river.
Kurt "Mountain Man" Steiner practices skipping stones

photo by diane soisson


To reach the upper echelons of the skipping world was not easy. Mackinac was divided into two heats. First there was the “Open” division, in which every fudge-eating tourist on the island was welcome. Usually there were a few hundred people who entered. Only by winning the Open can you move up into the “Professional” division, which features heavy hitters such as Russ “Rockbottom” Byars, whose Guinness World Record held for years at 51 skips; Max “Top Gun” Steiner, who took the title from Byars with 65; and Kurt “Mountain Man” Steiner (no relation to Max) who currently holds the title with 88.

But now that I stood on the edge of the big lake watching the waves roll in, I wondered how anyone could skip a rock more than a few times on water like this.

The next day, we packed up and drove north, through the melancholy streets of Escanaba, near the southwest corner of Michigan’s Upper Peninsula, then north into the woods whose narrow highways were lined with old motels, “available” Adopt-a-Highway sections, and the occasional teepee-shaped trinket shop. We stopped at Pictured Rocks National Lakeshore and walked down to the beach only to find it packed full of weekend sightseers, outfitted with hydration packs and selfie sticks.

The beach, however, was a goldmine of beautiful stones perfect for skipping: flat and smooth and almost perfectly weighted. For half an hour, I practiced in the waves. It was tricky, but it could be done. Some sank straight into the crest. Others went surprisingly far, riding up the front and down the back of the swells of Lake Superior.

“Thirteen,” my daughter said. “Not too bad.”

That night we camped at a rustic site on a lake in the forest. The next morning we packed up and drove the rest of the way to the small town of St. Ignace at the eastern end of the UP. There we found our campsite, set up the tent, and settled in. I dumped out my box of skippers to try to pick out my winners.

When I spread them on a tarp, it immediately became clear that there were not as many as I had hoped. I had around a hundred stones of varying quality: some rough sandstone from the Mississippi; others dense basalt from Lake Superior; a few random, jagged stones from nameless dirt roads.

Kurt "Mountain Man" Steiner sorting his skipping stones.
Kurt "Mountain Man" Steiner sorting his skipping stones

photo by ryan seitz. Courtesy of the documentary skipping stones for fudge


Some, I could see, were too light, and would probably fly up off the water. Others were too smooth and symmetrical, and would “stick” to the surface instead of popping up off it. A few were too “edgy” and would risk either snagging and sinking, or have the tendency to tilt and hook to the left or right, instead of running straight out into the water. What you want, according to reigning champ Kurt Steiner, is a stone that is not perfectly round but that has points, or lobes, that act as spokes. As the stone spins, these points will push the stone up off the water, keeping it airborne and preventing it from sticking.

“If you spin it fast enough, the stone will essentially walk on those spokes,” Steiner told me, when I had called him for skipping advice. “A really good skip tends to walk like that.”

Tomorrow, I would have six throws, and I found my six best stones. Three were nearly perfect. Three were flawed, either too light, or poorly weighted. But they all had good, flat bottoms. I would have to make the best of them.

That night on mackinac, some of the pros were gathering for dinner and a screening of a new documentary about the scene, called Skips Stones For Fudge, which I wanted to see. So I went down to the harbor and took a ferry over.

Mackinac Island is a strange place. It has been a tourist trap for well over a century, but it is also a state park, and a kind of living history center. Motorized vehicles are banned, so all transport—including hauling garbage—must be done by horse. The main street is lined with fudge shops, and on hot summer days the mingling smells of chocolate and horse manure are the first things you notice when you get off the boat.

The street was so packed with people I could barely walk down it. But I finally made it to the Yacht Club, an old house that looked out over the harbor. Inside, I found John “The Sheriff” Kolar, who helps organize the tournament (and who held the world record in a three-way tie from 1977 to 1984) and he introduced me to other skippers, including Max Steiner, Glen “Hard Luck” Loy (another 1977-1984 title holder), and Mike “Airtight Alibi” Williamson, 2014 winner (who recently went rogue and skipped stones across the Lincoln Memorial reflecting pool).

The room, in other words, was filled with rock-skipping royalty. But you wouldn’t have known it if you just wandered in. Elite stone skippers are more like athletes in the vein of Olympic bowlers. By day they are electrical engineers, computer technicians, rental car franchise managers. But here on Mackinac, they have climbed to the very height of this sport. Here, once a year, they are the best in the world.

Before dinner, I sat down next to Williamson. He’s a former DOT worker who reminded me of an uncle you don’t know very well at a family reunion. He is aging, balding, and not in particularly good shape. Two years ago he tore one of his biceps at the competition. But he keeps coming back, and it was clear why.

“Whenever I throw stones out on the water,” he told me, “it’s like throwing a shooting star.”

After dinner, and the film (which hinges on the rivalry between Russ Byars and Kurt Steiner and is full of gorgeous, long throws on still water…stone skipping porn), I caught the last ferry to the mainland. That night, I lay in our tent and dreamed of rocks gliding, of weightlessness, and of stones sinking into the waves.

The next morning, the sky was clear. Waking up, I couldn’t hear any waves, but I could see the sun peeking across the lake. I gathered my stones, and the four of us drove down to the harbor to catch the early ferry. As we sailed across the water, I fumbled with my rocks, wondering how they would do. The water seemed calm. My stomach less so.

Near the island, I could see American flags everywhere, in honor of Independence Day. As we disembarked, the air was still cool and there was little manure in the streets. The island had a celebratory, historic feel. It evoked a mix of hope and nostalgia I hadn’t felt for a long time.

Windermere Pointe Beach at the Iroquois Hotel, site of the Mackinac Island stone skipping competition.
Windermere Pointe Beach at the Iroquois Hotel, site of the Mackinac island stone skipping competition

photo by christi dupre


We walked to the rocky beach where the competition would be held and each of us threw a few practice stones. The water was calm when no ferries came by, but it was a mess of chop when they did.

We lingered on the beach until the registration opened. We needed to fill out a form with our name and our nickname, which I had forgotten about. I panicked and scribbled “Flatbottom.” My oldest daughter looked at my sheet.

“What kind of nickname is that?” she asked.

“You know, the flat bottom of the skipping stone,” I said.

“So if I have a triangle stone, with a flat bottom, that would be a good skipper?"

“No,” I said.

She shrugged.

Max Steiner throwing a stone at the Iroquois Hotel on Mackinac Island.
Max Steiner

photo by ryan seitz


Soon the pros started to arrive. Max Steiner (65 skips) gave our girls lessons while I tried to eavesdrop. I heard someone say, “Russ is here,” and I looked over to see Byars (51 skips), the six-time Mackinac champ who still held the highest score ever recorded here: 33 skips. He brought two large bags full of stones from the south shore of Lake Erie for anyone who needed them. I introduced myself. “What do you think your chances are today?” I asked.

Byars took a drag on his cigarette. “Good as anyone,” he said. “I’ve seen really good skippers throw straight to the bottom every time. You never know.”

A loudspeaker crackled. “Let he who is without Frisbee cast the first stone!”

The judges gathered their clipboards and spread out along the water’s edge. The open competition had begun. Slowly, a few brave souls wandered down, handed over their score sheets, and began skipping while the judges counted as best they could (video replays were banned in the 1970s) and wrote down their scores. Some were clearly tourists who had happened upon the tournament. Others were like me—those who had been quietly honing their craft on unknown lakes and rivers. They had driven hundreds of miles in hopes of making it to the elite level.

As we watched other amateurs skip, I was nervous. I looked at the water. We were supposed to skip as a family and I wanted to time our turn between the ferries. In a lull, my oldest daughter looked at me. There were no boats in sight. I nodded. She walked down to the nearest judge, gave him her sheet and started skipping her stones. She threw a couple threes and fours, and finally an eight. Our youngest wanted to do the “Gerplunking” contest across the beach, where kids tried to make the loudest splash, so my wife went next, also throwing some low single digits, but ending up with a solid 12.

The judge looked at me. “You going too?”

I looked at the water. There was a boat far off toward the mainland. A few others sat in the docks on the island. There was no telling how long they would stay there. I handed over my sheet, and took out my first stone.

Just then, a ferry started to back away from the island. If I went fast, I could still have good water. More ferries appeared on the horizon. Maybe I could thread the needle.

As I got ready to throw, some wide waves began to roll in. I drew my first stone back and let it fly. It went out strong and straight, then plunged into the side of a wave.

“Four,” the judge said, writing it down.

Sweat ran down my back. I waited for the water to settle, drew back the second stone and threw. It had good spin, and was not sticking or hooking. It went fast and hard. On calm water it would have gone forever. At Mackinac, it slowed in the waves and then sank gently.

“Nineteen.”

I knew I could do better. The next stone I tried to shoot through a trench between two big rollers. But it jumped the edge and got caught in the wave behind.

“Twelve.”

“The last stone. It was my best one, a perfect oval just the right weight. I relaxed my, drew it back, and sent it sailing,”

Someone down the beach yelled, “The Canadian just hit the ferry!”

Was that Drew “The Canadian” Quayle, who had made an appearance in the documentary? Distracted, I tried to focus. My stones were getting worse. Fourth one: went out like a bullet, clipped the top of a wave, and shot straight up into the sky.

“Seven.”

I grabbed the fifth stone tight. I threw it as hard as I could. Too hard.

“Eight.”

The last stone. It was my best one, a perfect oval just the right weight. I needed to get up over 20. I cleared my mind. I relaxed my arm, drew it back, and sent it sailing. As soon as it left my fingers,
I knew it was a good throw. It ran straight out across the water before finally getting caught in the waves.

“Eighteen,” was the call.

The four of us walked back up the beach. My daughter took my sheet and analyzed my scores.

“Pretty good, Daddy!” she said.

A little while later, they announced a three-way tie for first place with 22 skips each. I had tied for second with a guy from Ohio. This year, at least, I would not be moving into the pros.

The amateurs’ tie was broken with a sudden-death skip off, which “The Canadian” (yes, it was Drew Quayle) won. After that, the real show began, with a competition featuring four former Guinness World Record holders, six past Mackinac winners, and a few young newcomers.

“We got a lot of 60-year-old arms out there,” one of the judges next to me muttered. “It’s good to have some new blood.”

The beach filled with spectators and amateurs. We found seats where we could see. One by one the masters walked down to the water and spun their stones out across its surface as a three-judge panel counted, conferred, and scored. The crowd cheered at the good throws and groaned at the bad ones. The old arms warmed up and the numbers climbed from 19 to 22 to 25 and finally to a beautiful, long, left-handed 27 by Dave “Lefty” Kolar, that no one was able to top. (A few of the pros, I noted, didn’t break 19.)

When the last stone was thrown, the announcer closed the games. Skippers and fans wandered back to the island’s streets. As the beach emptied, I felt a sudden wistfulness, and realized I didn’t want the day to end.

There would be other years, other lakes. Still, we lingered on the empty beach, feeling the sun, listening to the waves, and scanning the ground for the next stone waiting for its turn to fly.


Déjà vu so extreme that I can’t tell what’s real

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One drab afternoon a few years ago something very unusual happened to me.

I was lounging under a tree in a packed east London park when I experienced a sudden feeling of vertigo, followed immediately by an overwhelming and intense sense of familiarity.

The people around me vanished and I found myself lying on a tartan picnic blanket amid a field of high golden wheat. The memory was rich and detailed. I could hear the sway of the wheat ears as a gentle breeze brushed through them. I felt warm sunlight on the back of my neck and watched as birds wheeled and floated above me.

It was a pleasant and extremely vivid recollection. The problem was that it never actually happened. What I was experiencing was an extreme form of a very common mental illusion: déjà vu.

We view our memories as sacred. One of the most fundamental doctrines of Western philosophy was established by Aristotle. He saw a newborn baby as a kind of empty ledger, one that is gradually filled as the child grows and accumulates knowledge and experience.

Whether it’s how to tie a shoelace or recalling your first day at school, memories make up the autobiographical map that helps us navigate the present day. Jingles from old television adverts, the name of the second-to-last prime minister, the punchline to a joke: memories are the constituent parts of individual identities.

Most of the time memory systems run quietly in the background as we go about the business of everyday life. We take their efficiency for granted. Until, that is, they fail.

For the past five years I have been suffering epileptic seizures resulting from the growth and eventual removal of a lemon-sized tumour from the right-hand side of my brain. Before my diagnosis I appeared fit and healthy: I was in my mid-30s and displayed absolutely no symptoms. Until, that is, the afternoon that I woke up on the kitchen floor with two black eyes after suffering my first recorded seizure.

Seizures, or fits, occur after an unanticipated electrical discharge in the brain. They are usually preceded by something called an ‘aura’, a sort of minor foreshock lasting anything up to a couple of minutes before the main event begins. The nature of this aura differs greatly from patient to patient. Some people experience synaesthesia, extreme euphoria and even orgasm at the onset of a seizure. My own aren’t nearly as exciting-sounding, being distinguished by sudden shifts in perspective, a rapidly increased heart rate, anxiety, and the occasional auditory hallucination.

Pioneering English neurologist John Hughlings Jackson was the first to define the epileptic aura, observing in 1898 that its hallmarks included vivid memory-like hallucinations, often alongside the feeling of déjà vu. “Old scenes revert,” one patient told him. “I feel,” said another, “in some strange place.”

By far the most significant trait of my aura is the striking sense of having lived through that precise moment before at some point in the past – even though I never have. During my most intense seizures, and for a week or so afterwards, this feeling of precognition becomes so pervasive that I routinely struggle to discern the difference between lived events and dreams, between memories, hallucinations and the products of my imagination.

I don’t remember déjà vu happening with any kind of regularity before the onset of my epilepsy. Now it occurs with varying degrees of magnitude up to ten times a day, whether as part of a seizure or not. I can find no pattern to explain when or why these episodes manifest themselves, only that they usually last for the length of a pulse before vanishing.

Many of the estimated 50 million people in the world with epilepsy experience long-term memory decline and psychiatric problems. And it’s hard for me not to worry whether the blurring of fact and fiction that I experience might one day engender a kind of mania. By trying to understand more about déjà vu, I’m hoping to make sure that I never lose my way on the path back to reality from that same ‘strange place’.

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In Catch-22, Joseph Heller described déjà vu as “a weird, occult sensation of having experienced the identical situation before in some prior time or existence”. Peter Cook put it his own way in a magazine column: “All of us at one time or another have had a sense of déjà vu, a feeling that this has happened before, that this has happened before, that this has happened before.”

Taken from the French for ‘already seen’, déjà vu is one of a group of related quirks of memory. Research from 50 different surveys suggests that around two-thirds of healthy people have experienced déjà vu at one time or another. For the majority, it is dismissed as a curiosity or a mildly interesting cognitive illusion.

While déjà vu is instantaneous and fleeting, déjà vécu (already lived) is far more troubling. Unlike déjà vu, déjà vécu involves the sensation that a whole sequence of events has been lived through before. What’s more, it lacks both the startling aspect and instantly dismissible quality of déjà vu.

A defining feature of the normal déjà vu experience is the ability to discern that it isn’t real. On encountering déjà vu, the brain runs a sort of sense check, searching for objective evidence of the prior experience and then disregarding it as the illusion that it is. People with déjà vécu have been known to lose this ability completely.

Professor Chris Moulin, one of the foremost experts on the déjà experience, describes a patient he encountered while working at a memory clinic at a hospital in Bath, England. In 2000, Moulin received a letter from a local GP referring an 80-year-old former engineer known as AKP. As a result of gradual brain-cell death caused by dementia, AKP was now suffering from chronic and perpetual déjà vu: déjà vécu.

AKP claimed that he had given up watching television or reading the newspaper because he knew what was about to happen. “His wife said that he was someone who felt as though everything in his life had happened before,” says Moulin, now at the Laboratoire de Psychologie et NeuroCognition CNRS in Grenoble. AKP was resistant to the idea of visiting the clinic because he felt as though he’d already been there, despite the fact that he never had. On being introduced to Moulin for the first time, the man even claimed to be able to give specific details of occasions that they had met before.

AKP did retain some self-awareness. “His wife would ask him how he could know what would happen in a television programme if he’d never seen it before,” says Moulin, “to which he would respond, ‘How would I know? I have a memory problem.’”

On that day in the park, my vision of the picnic blanket and the wheat field disappeared when a paramedic began to shake my shoulder. Despite the fact that my memories had been hallucinations, they still felt as valid as any truly autobiographical memory. Moulin classes this as a form of déjà experience in which an image is somehow imbued with a sense of reality.

“Our feeling is that déjà vu is caused by a sense of familiarity,” he says. “Rather than just feeling like something has a feeling of ‘pastness’ about it, something comes to mind that has a phenomenological characteristic, so that it appears to be a real reminiscence.”

Other patients of Moulin’s have exhibited what cognitive scientists call ‘anosognosic’ tendencies, either being unaware of their condition or lacking the immediate capacity to tell memory from fantasy. “I spoke to one woman who said that her feelings of déjà vu were so strong that they were for her exactly like autobiographical memories,” Moulin tells me. “Some of the things that happened to her were quite fantastic; she’d have memories of taking helicopter flights. These memories were hard for her to overcome because she had to spend a long time trying to work out whether something had happened.”

After his first encounter with AKP, Moulin began to become interested in the causes of déjà vu and how subjective feelings can interfere with day-to-day memory processes. Discovering that there was very little credible literature describing the causes of déjà vu, Moulin and colleagues at the Language and Memory Lab at the Institute of Psychological Sciences, University of Leeds, began to study epileptics and other sufferers of profound memory defects in order to draw conclusions about déjà experiences in the healthy brain and explore what déjà vu means for the workings of consciousness generally.

They were faced with an immediate problem: déjà vu experiences can be so transitory and short-lived that they are almost impossible to recreate in clinical conditions. The job that they faced, then, was one of trying to catch lightning in a bottle.

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Émile Boirac was a 19th-century psychic researcher and parapsychologist with an interest in clairvoyance typical of the Victorian era. In 1876, he wrote to a French philosophy journal to describe his experience of arriving in a new city but feeling as though he had visited it before. Boirac coined the phrase déjà vu. He suggested that it was caused by a sort of mental echo or ripple: that his new experience simply recalled a memory that had previously been forgotten.

While this theory is still considered plausible, subsequent attempts at explaining déjà vu experiences have tended towards the more outlandish.

Sigmund Freud’s 1901 book The Psychopathology of Everyday Life is most famous for exploring the nature of the Freudian slip, but it also discusses other defects in the process of recollection. The book documents one female patient’s déjà experiences: on entering a friend’s house for the first time, the woman had the feeling that she had visited before and claimed to know each successive room in the house before she walked through it.

What Freud’s patient experienced as she walked through the house would now be described specifically as déjà visité, or ‘already visited’. Freud attributed his patient’s feeling of déjà visité to the manifestation of a repressed fantasy that only surfaced when the woman encountered a situation analogous to an unconscious desire.

Again, this theory hasn’t been entirely discredited, although somewhat typically Freud also suggested that déjà vu could be traced back to a fixation on the mother’s genitals, the sole place that, he wrote, “one can assert with such conviction that one has been there before”.

The accepted scientific definition of déjà vu was formulated by South African neuropsychiatrist Vernon Neppe in 1983 as “any subjectively inappropriate impression of familiarity of the present experience with an undefined past”. He also identified 20 separate forms of déjà experience. Not all of them were related to seeing: one of Chris Moulin’s patients was a man who had been blind since birth yet claimed to have experienced déjà vu, while Neppe’s descriptions of déjà experiences include déjà senti (already felt) and déjà entendu (already heard).

Freud’s diagnosis of déjà vu as a purely psychological phenomenon – rather than one caused by neurological errors – had the unfortunate effect of shifting explanations for déjà experiences towards the absurdly mystical.

In 1991 a Gallup poll of attitudes towards déjà vu placed it alongside questions about astrology, paranormal activity and ghosts. Many people consider déjà vu to be outside the realm of everyday cognitive experience, with assorted cranks and crackpots claiming it to be incontrovertible proof of extrasensory perception, alien abduction, psychokinesis or past lives.

It’s not hard for me to feel sceptical about this last explanation in particular, but these fringe theories mean that déjà vu has received very little attention from mainstream science. Only now, almost 150 years after Émile Boirac invented the phrase, are researchers like Chris Moulin beginning to understand what actually causes the system errors in what neuroscientist Read Montague memorably called the “wet computer” of the brain.

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The hippocampus is a beautiful looking thing. The mammalian brain contains two hippocampi, positioned symmetrically at the bottom of the brain. ‘Hippocampus’ is the ancient Greek word for seahorse, and there’s a resemblance in the way that a seahorse’s delicate tail coils in on itself to meet its long snout. It’s only in the last 40 years that we have really begun to understand what these delicate structures do.

Scientists used to think of memories as being arranged together tidily in one place, like documents in a filing cabinet. This consensus was overturned in the early 1970s when cognitive neuroscientist Professor Endel Tulving proposed his theory that memories actually belong to one of two distinct groups.

What Tulving called “semantic memory” refers to general facts that have no real bearing on personality, being independent of personal experience. “Episodic memories”, meanwhile, consist of recollections of life events or experiences. The fact that the Natural History Museum is in London is a semantic memory. The time that I visited it on a school trip at the age of 11 is an episodic one.

Aided by advances in neuroimaging, Tulving discovered that episodic memories are generated as small pieces of information at different points across the brain and then reassembled into a coherent whole. He saw this process as akin to actually experiencing episodic memories again. “Remembering,” he said in 1983, “is mental time travel, a sort of reliving of something that happened in the past.”

Many of these memory signals arose from the hippocampus and the area surrounding it, suggesting that the hippocampus is the brain’s librarian, responsible for receiving information already processed by the temporal lobe, then sorting, indexing and filing it as episodic memory. Just as a librarian might order books by subject matter or author, so the hippocampus identifies common features between memories. It might use analogy or familiarity, for example grouping all memories of various museum visits together in one place. These commonalities are then used to link the constituent parts of episodic memories together for future retrieval.

It’s no coincidence that people with epilepsy whose seizures tend to trigger déjà vu are those whose seizures originate in the part of the brain most involved with memory. Nor is it surprising to learn that temporal lobe epilepsy affects episodic memory more than semantic memory. My own epilepsy originates in the temporal lobe, a region of the cerebral cortex tucked behind the ear and responsible primarily for the processing of incoming sensory information.

In his book The Déjà Vu Experience, Professor Alan S Brown offers 30 different explanations for déjà vu. According to him, any one alone may be enough to trigger a déjà experience. As well as a biological dysfunction like epilepsy, Brown writes that stress or tiredness could cause déjà vu.

My experiences of déjà vu began during the long period of recuperation following my brain surgery, a time spent almost entirely indoors, moving in and out of a series of semi-conscious states that mostly included being sedated with opiates, sleeping and watching old movies. This recuperative twilight state might have made me more susceptible to déjà experiences, through being fatigued, taking in an excess of sensory information or relaxing to the point of being comatose. But my situation was clearly an unusual one.

Brown is also a proponent of what is called the divided perception theory. First described in the 1930s by Dr Edward Bradford Titchener, divided perception refers to the times when the brain isn’t quite paying enough attention to its surroundings. Titchener used the example of a person about to cross a busy street before being distracted by a shop window display. “As you cross,” he wrote, “you think, ‘Why, I crossed this street just now’; your nervous system has severed two phases of a single experience, and the latter appears as a repetition of the earlier.”

For much of the last century this idea was accepted as a plausible trigger of déjà vu. Another common explanation was one offered by a doctor working at the Boston veterans’ hospital. In 1963 Robert Efron suggested that déjà vu could be caused by a sort of processing error: he believed that brains were responsible for assimilating events through the temporal lobe before then adding a sort of timestamp to them to determine when they happened.

Efron saw déjà vu as resulting from the lag between seeing and adding that timestamp: if the process took too long, the brain would think that an event had already happened.

But Alan Brown and Chris Moulin both agree that the way that the hippocampus indexes memories by cross-referencing them according to familiarity is a more likely cause of déjà vu.

“My belief is that a per-seizure déjà vu experience is triggered by spontaneous activity in that area of the brain that handles familiarity evaluations,” says Brown. Probably, he says, in the area surrounding the hippocampus, and most likely on the right side of the brain. The precise point at which I have a lemon-shaped hole.

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At Duke University’s Department of Psychology & Neuroscience, Alan Brown and Elizabeth Marsh devised an experiment to test Brown’s theory that déjà vu experiences are caused by an error when the hippocampus does its job of grouping memories. At the start of the experiment, students from Marsh’s and Brown’s universities (Duke and the Southern Methodist University in Dallas) were briefly shown photographs of locations – dorm rooms, libraries, classrooms – on the two campuses.

A week later the students were shown the same pictures, this time with new images inserted into the set. When asked if they’d visited all of the locations in the photographs, a portion of the students replied yes – even if the photograph in question was of the rival campus. Many university buildings look the same, so by planting the seed of confusion about which places the students had actually visited, Brown and Marsh were able to conclude that just one element of an image or experience can be enough for the brain to call up a familiar memory.

Chris Moulin and his University of Leeds colleague Dr Akira O’Connor had already recreated déjà vu in lab conditions in 2006. Their aim was to find out more about the process of memory retrieval by exploring the difference between the brain registering an experience and then running that sense check to see if the same experience had actually occurred before or not.

Moulin suggests that déjà vu is caused by a “momentary overinterpretation of familiarity, something that comes about through panic or stress or that triggers a sense of something other. You’ve got this very excitable part of the brain which is just scanning the environment all the time looking for familiarity,” he says, “and something goes on in déjà vu which means [there’s] some other information inbound later that says: ‘This can’t be familiar.’”

Moulin concluded that the brain operates a sort of spectrum of memory retrieval, ranging from the completely successful interpretation of visual memory at one end and a full state of perpetual déjà vécu at the other. At some point along the spectrum lies déjà vu – neither as serious as déjà vécu, nor as seamless as the way that the brain should be working.

Moulin also suggests that somewhere in the temporal lobe is a mechanism for regulating the process of remembering. Problems with this – like the ones caused by my temporal lobe epilepsy – can leave patients without any kind of fallback to let them know that what they’re seeing has never happened to them before, effectively trapping them forever in a Moebius strip of memory.

But why do normally healthy people encounter it?

Brown suggests that déjà vu happens to healthy people only a few times a year at most, but can be stimulated by environmental factors. “People experience it mainly when they are indoors,” he says, “doing leisure activities or relaxing, and in the company of friends; fatigue or stress frequently accompany the illusion.” He says that déjà vu is relatively brief (10 to 30 seconds), and is more frequent in the evening than in the morning, and on the weekend than on weekdays.

Some researchers claim a connection between the ability to remember dreams and the likelihood of experiencing déjà vu. In his work, Brown suggests that although déjà vu occurs equally in women and men, it is more common in younger people, those that are well-travelled, earn higher incomes and whose political and social outlooks are more aligned to the liberal.

“There are some plausible explanations for this,” he tells me. “People who travel more have more opportunities to encounter a new setting that they may find strangely familiar. People with liberal beliefs may be more likely to admit to having unusual mental experiences and willing to figure them out. A conservative mindset would likely avoid admitting to having strange mental events, as they might be seen as a sign that they are unstable.

“The age issue is a puzzle because memory usually gets more quirky as we age, rather than the other way around. I would guess that young people are more open to experiences and more in touch with unusual mental happenings.”

One of the first comprehensive studies of déjà vu was conducted in the 1940s by a New York undergraduate student called Morton Leeds. Leeds kept an extraordinarily detailed diary of his frequent déjà experiences, noting 144 episodes over the course of a year. One of these episodes, he wrote, was “so strong that it almost nauseated me”.

Following my most recent seizures I’ve experienced something similar. The shock of repeated déjà vu isn’t physical, necessarily, but instead causes a kind of psychic pain that can feel physically sickening. Dream images suddenly interrupt normal thoughts. Conversations seem to have already taken place. Even banal things like making a cup of tea or reading a particular newspaper headline seem familiar. It feels occasionally like I’m flicking through a photo album containing nothing but the same picture reproduced endlessly.

Some of these sensations are easier to dismiss than others. Coming closer to finding an answer to what causes déjà vu also means approaching a kind of resolution for my more persistent déjà episodes, the ones that are the hardest of all to live with.

The night before completing this piece I had another seizure. The deadline had clearly been on my mind, as I suddenly had an intense memory of sitting down to write these closing sentences. When I regained my composure enough to read the finished article the next day, there was nothing here but blank space. It was another illusion. Now I’m actually typing this conclusion. It is, to borrow a famous solecism, like déjà vu all over again. 

How HSBC is applying AI to imporove their anti-money laundering operations

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Anti-Money Laundering is a particularly challenging area of regulation for banks and even more so for large, geographically diverse institutions. What makes AML such a difficult problem to solve is that it involves complex data, detailed workflows, and significant human involvement.

In short it is perfect for AI.

This is what HSBC determined in their work with Ayasdi on a notoriously difficult problem – that of bank’s customer’s customers, also known as KYCC (know your customer’s customer). The vast majority (~95%) of AML investigations do not result in a suspicious activity report (SAR). This is called a ‘false positive’ – transactions that are flagged for investigation, but are not suspicious based on a deeper review.

Working with Ayasdi, HSBC was able to achieve a significant reduction in false positives (more than 20%) while keeping their suspicious activity reports at the same number.

The Modern AML Challenge

AML is a massive problem and is estimated to be around $1 to $2 trillion per year and growing. Given that the vast majority of those transactions end up funding bad people doing bad things, governments have stepped up their regulatory requirements, oversight and fines.

Banks have scrambled to respond to the increasing regulatory burden. The result is that the cost of compliance is increasing 50% year-over-year and quickly becoming a drag on earnings at a critical time for financial institutions. The complexity and costs are amplified for large, geographically diverse, financial institutions.

At the heart of the problem is the balance between signal and noise. Too much noise in the form of false positives increases costs for the bank as they need to investigate the suspicious activity reports. Too little signal means that the bank might miss criminals triggering a number of negative regulatory outcomes ranging from fines to physical observation.

Compared to its peer banks, HSBC’s AML infrastructure is the world’s best – so much so that it is often treated as a reference workflow. Current AML processes typically have hand-coded or, in the case of more sophisticated players like HSBC, machine-coded money laundering rule scenarios to evaluate each transaction for each geography or type of business. Subject matter experts encode established patterns such as high repetitive number of small transactions (structuring), money flows in and out of high-risk countries, etc.

Sophisticated institutions like HSBC go one step further and create segments of customers. The segments that emerge, however, are typically static and coarse since they only take into account a limited set of factors about each customer or entity. Moreover, they are done manually and separately for customer data and transaction data and have trouble effectively capturing the complex feature interactions.

This has a massive effect downstream as the rules are applied on a set of coarsely defined segments. When AML rules are triggered, the offending transactions must be investigated and adjudicated – creating the Hobbesian choice of regulatory exposure or throwing bodies at the problem.

HSBC saw past this false choice and transformed its AML process using enterprise grade AI.

Stop Changing the Rules, Change the Game

HSBC needed a principled approach to rule creation and segment creation to get their false positives under control. They also needed to be sure that any effort strengthened their ability to detect real criminals (false negatives). They also needed this approach to integrate with existing processes.  

HSBC applied Ayasdi’s analytical approach to transform their process. We have written on that process elsewhere– so we will focus on the application of that process to AML in this case.

  • First, they used unsupervised learning techniques to automatically create groups of customers and customers-of-customers (in correspondent banking situations).
  • Second, for each group discovered earlier, using historical data and supervised/predictive approaches they ranked the likely launderers.
  • Third, the solution created a justification for both the segments and the predictions.
  • Finally, the system integrates with other applications (Act) and learns from new data (Learn), alerting the risk team to re-evaluate as the criminals evolve their methods.

Let’s start with the concept of unsupervised discovery. In most AML processes, subject matter experts make the determination of the rules or scenarios around what should trigger an investigation. HSBC put their subject matter experts onto this problem, however, when information was limited (as in the case of KYCC where only the transaction data was available), the thresholds for triggering the rules were creating far too many false positives. One major source of these problems was that they used K-Means clustering (with a Bayesian Information Score to determine the number of clusters). While K-Means clustering is a wonderful algorithm, it suffers from the following issues:

  1. It requires O(n^2) distance computations per step. For a dataset with 10 million customers, this translates to 100 trillion distance computations and 800TB memory/disk. Note that the 10 million number is rather modest.
  2. Since computing segments on the entire dataset is not feasible, the team down-sampled the data to a few thousand customers, to be able to fit the data in memory and process it in a reasonable amount of time.
  3. Sampling combined with the inherent instability of K-Means meant that the segments were not representative of the dominant modes in the data.
  4. Finally, since K-Means is an unstable algorithm, the general recommendation is to not use it with high dimensional data. This meant that the team had to select a small handful of features to use in the segmentation.

HSBC and Ayasdi used Topological Data Analysis (TDA) and machine learning (ML) to automatically assemble self-similar groups of customers and customers-of-customers. This exercise was done entirely unsupervised, with Ayasdi’s software making the selection of the appropriate algorithms, creating candidate groups and tuning the scenario thresholds within those groups until the optimal ones were identified. In this case, the platform automatically normalized the data columns and combined multi-dimensional scaling and single linkage clustering algorithms to create the topological model. This was then passed through an agglomerative hierarchical clustering algorithm which was optimized to produce balanced segments.

As with most ML/AI solutions, ours has an insatiable appetite for data. The more data sources that are available, the better the grouping. This includes, customer and transaction data. Unlike most ML/AI solutions Ayasdi is particularly adept at high dimensional data and where more of that data tends to break most ML/AI solutions, we eat it up.

What was important in the HSBC work was that Ayasdi was able to work with unlabeled data. What that means is that the SWIFT traffic activity are enough to produce meaningful segments.  This increases the number of data sources considerably and brings into play a bank’s customers customer (KYCC).

These new groups were assembled in a completely different fashion than the previously constructed groups. One key feature was that the groups were more evenly distributed than the previously constructed groups.

As a general rule, the more powerful the model the more of a black box it is. This black-box problem is well known to the financial services community and is particularly problematic in the AML setting since the banks need regulatory approval for these models. HSBC’s savvy Internal Model Review team understood that a black box was an unacceptable option – no matter how powerful or explanatory. They required transparency.

Fortunately, for HSBC, Ayasdi was able to deliver both explanatory power and explainability. In this case, the explanation came in the form of a decision tree that could explain the new segmentation and rules to both the internal model review board and the external regulatory stakeholders. The general pattern of using simpler models such as decision trees to understand more complicated models is going to be critical as we build trust with heavily augmented or automated solutions.

The final step to creating a deployable solution was creating the appropriate thresholds by which to trigger investigations.

The bank has over 40 distinct money laundering scenarios, each of which have several parameters that must be tuned for each customer segment. Using the process that the bank had previously used on its existing segmentation, HSBC tuned each of these parameters for each of the scenarios tested based on the updated segmentation. As in the prior production approach, all parameters were tuned to ensure that every Suspicious Activity Report (SAR) previously issued would still have been flagged by the updated rules.  

With this final step all of the elements of a transformative, operational AML solution exist.

It has unsupervised learning to create the segments, uses supervised learning to predict what groups new customers should go into, justifies those groups and changes to those groups, feeds the transaction management system and learns from new data – adapting to the changing behavior of criminals.

The ultimate goal of this new AML workflow (rule engine + transaction monitoring) is a highly principled, defensible, ranked list of transactions/entities to investigate.  

HSBC by the Numbers

As noted, HSBC is a sophisticated player in the AML space and was already creating segments. Further, they were dedicated to continuous improvement and were willing to invest to achieve those ends.

The bank had an internal goal to improve operational efficiency in the elusive KYCC area by 3% with a stretch goal of 5%. They had a timeline to achieve this that was measured in years. They generated in excess of 800,000 alerts per month and had more than 5,000 members on their investigative team – a number that is expected to grow to 7,000 – reflecting their commitment to the AML challenge.

The initial work involved SWIFT data for over 70 million transactions. Ayasdi had access to the same features as the client, however, our technology was able to use more of them and do so more intelligently. Ultimately, Ayasdi discovered close to 1,000 features whereas the bank’s current technology was only able to use less than 10 features. While the project ultimately employed over 120 features, this 12X increase drove far superior performance. The increased feature count was a function of being able to incorporate and create features on transactional data (type, direction, value), customer data (geographical, chronological) and risk data.

By applying AI to the problem, the bank was able to achieve reductions in investigative volume of more than 20% while simultaneously lowering their regulatory exposure by discovering new risk segments that had gone unnoticed.

While the ROI on the project is confidential, the savings to the bank is into the tens of millions of dollars per year. Perhaps more importantly, the bank now has the most sophisticated system in the world and is able to represent that work to their external stakeholders.

The initial project took twelve weeks and involved a team of two data scientists and a project manager from Ayasdi, and a team of two domain experts from the bank. The twelve weeks included data access, transforms, etc. Once completed the initial “run” from a compute perspective took eight hours to go from raw data to the segments and predictive segment models. The plan is to re-run every month to ensure that the segmentation captures the modes of the data as it evolves. The run time of eight hours compares to six months of manual segmentation and review by the business unit leaders.

Summary

In the evolving world of regulation there is considerable pressure to achieve a target of “zero failure.” The approaches that banks have employed to date, both historically and in response to enhanced regulatory scrutiny is fundamentally driven by humans. The complexity of the AML challenge, however, is not well suited to the hand-coded approach that dominates most institutional thinking.

There is an opportunity to apply sophisticated techniques from AI to this mission-critical regulatory function that can dramatically improve efficiency while simultaneously reducing regulatory exposure. Furthermore, this new generation of technology provides exceptional transparency on what is driving the rule sets and segmentation.  

To find out how to leverage AI for your AML challenges reach out to us at sales@ayasdi.com to arrange for a demonstration.

All back issues of Omni magazine now available online

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Good news for Omni magazine fans – all 200 issues are now available on Amazon for $2.99 each, or free if you're a Kindle Unlimited subscriber.

Up until a couple of years ago the science and science fiction magazine, which was created by Bob Guccione of Penthouse and his wife Kathy Keeton and ran from 1978–1995, could be be accessed for free on the Internet Archive, but it was taken down.

According to The Verge:

Earlier this week, Jerrick Media, owner of the Omni brand, announced that it was partnering with the Museum of Science Fiction to put the original issues of the magazine back online — this time in high-resolution. Instead of Archive.org, readers can find all 200 issues of the magazine on Amazon...

It’s a bit of a shame that the issues are no longer on the Internet Archive, but it is good to see that they’re back online once again. A portion of the proceeds from sales of the magazine will go to support the museum.

You can browse back issues at Omni Archive and then if you need to get your hands on a copy you can purchase individual copies from the site via Amazon.

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