
The Prodigy
A Biography of William James Sidis, America's Greatest Child Prodigy
No se pudo agregar al carrito
Add to Cart failed.
Error al Agregar a Lista de Deseos.
Error al eliminar de la lista de deseos.
Error al añadir a tu biblioteca
Error al seguir el podcast
Error al dejar de seguir el podcast
$0.99/mes por los primeros 3 meses

Compra ahora por $24.95
No default payment method selected.
We are sorry. We are not allowed to sell this product with the selected payment method
-
Narrado por:
-
Aze Fellner
-
De:
-
Amy Wallace
Acerca de esta escucha
William Sidis, 1897-1944, was the world's greatest child prodigy. His IQ was an estiamted 50 to 100 points higher than Einstein's, the highest ever recorded or estimated. His father, a pioneer in the field of abnormal psychology, believed that he and his wife could create a genius in the cradle. They hung alphabet blocks over the baby's crib-and within six months little Billy was speaking. At 18 months he was reading The New York Times; at three, Homer in the original Greek. At six he spoke at least seven languages.
Told with flair and insight ... this is his story.
©1986, 2011 Amy Wallace (P)2011 David N. WilsonLos oyentes también disfrutaron...
-
Elon Musk
- De: Walter Isaacson
- Narrado por: Jeremy Bobb, Walter Isaacson
- Duración: 20 h y 39 m
- Versión completa
-
General
-
Narración:
-
Historia
When Elon Musk was a kid in South Africa, he was regularly beaten by bullies. One day a group pushed him down some concrete steps and kicked him until his face was a swollen ball of flesh. He was in the hospital for a week. But the physical scars were minor compared to the emotional ones inflicted by his father, an engineer, rogue, and charismatic fantasist.
-
-
megalomania on display
- De JP en 09-12-23
De: Walter Isaacson
-
Euclid's Window
- The Story of Geometry from Parallel Lines to Hyperspace
- De: Leonard Mlodinow
- Narrado por: Robert Blumenfeld
- Duración: 8 h y 13 m
- Versión completa
-
General
-
Narración:
-
Historia
Through Euclid's Window Leonard Mlodinow brilliantly and delightfully leads us on a journey through five revolutions in geometry, from the Greek concept of parallel lines to the latest notions of hyperspace. Here is an altogether new, refreshing, alternative history of math revealing how simple questions anyone might ask about space -- in the living room or in some other galaxy -- have been the hidden engine of the highest achievements in science and technology.
-
-
Wow!
- De Eric en 08-13-10
De: Leonard Mlodinow
-
The Man Who Knew Infinity
- A Life of the Genius Ramanujan
- De: Robert Kanigel
- Narrado por: Humphrey Bower
- Duración: 17 h y 26 m
- Versión completa
-
General
-
Narración:
-
Historia
In 1913, an unschooled young Indian clerk wrote a letter to G. H. Hardy, begging that preeminent English mathematician's opinion on several ideas he had about numbers. Hardy, realizing the letter was the work of a genius, arranged for Srinivasa Ramanujan to come to England. Thus began one of the most remarkable collaborations ever chronicled.
-
-
Thorough and Enjoyable
- De Roger en 05-23-08
De: Robert Kanigel
-
Your Brain Is a Time Machine
- The Neuroscience and Physics of Time
- De: Dean Buonomano
- Narrado por: Aaron Abano
- Duración: 8 h y 51 m
- Versión completa
-
General
-
Narración:
-
Historia
In Your Brain Is a Time Machine, brain researcher and best-selling author Dean Buonomano draws on evolutionary biology, physics, and philosophy to present his influential theory of how we tell and perceive time. The human brain, he argues, is a complex system that not only tells time but creates it; it constructs our sense of chronological flow and enables "mental time travel" - simulations of future and past events.
-
-
Great book on an underrated subject
- De Neuron en 05-09-17
De: Dean Buonomano
-
Business Biographies and Memoirs - Titans of Industry: Andrew Carnegie, J.P. Morgan, John D. Rockefeller, Henry Ford, Cornelius Vanderbilt
- De: J.R. MacGregor
- Narrado por: Kevin Kollins
- Duración: 14 h y 40 m
- Versión completa
-
General
-
Narración:
-
Historia
The five Titans of Industry discussed in this series are, without a doubt, the most influential and impactful men in American history. Without any one of them, the entire landscape of the US would be different. They are the founders of the American economy.
-
-
Loved this book
- De Ruby Sanderson en 09-14-19
De: J.R. MacGregor
-
Existential Physics
- A Scientist's Guide to Life's Biggest Questions
- De: Sabine Hossenfelder
- Narrado por: Gina Daniels
- Duración: 8 h y 7 m
- Versión completa
-
General
-
Narración:
-
Historia
Not only can we not currently explain the origin of the universe, it is questionable we will ever be able to explain it. The notion that there are universes within particles, or that particles are conscious, is ascientific, as is the hypothesis that our universe is a computer simulation. On the other hand, the idea that the universe itself is conscious is difficult to rule out entirely.
-
-
Unscientific and unengaging
- De Jase G en 03-29-23
-
Elon Musk
- De: Walter Isaacson
- Narrado por: Jeremy Bobb, Walter Isaacson
- Duración: 20 h y 39 m
- Versión completa
-
General
-
Narración:
-
Historia
When Elon Musk was a kid in South Africa, he was regularly beaten by bullies. One day a group pushed him down some concrete steps and kicked him until his face was a swollen ball of flesh. He was in the hospital for a week. But the physical scars were minor compared to the emotional ones inflicted by his father, an engineer, rogue, and charismatic fantasist.
-
-
megalomania on display
- De JP en 09-12-23
De: Walter Isaacson
-
Euclid's Window
- The Story of Geometry from Parallel Lines to Hyperspace
- De: Leonard Mlodinow
- Narrado por: Robert Blumenfeld
- Duración: 8 h y 13 m
- Versión completa
-
General
-
Narración:
-
Historia
Through Euclid's Window Leonard Mlodinow brilliantly and delightfully leads us on a journey through five revolutions in geometry, from the Greek concept of parallel lines to the latest notions of hyperspace. Here is an altogether new, refreshing, alternative history of math revealing how simple questions anyone might ask about space -- in the living room or in some other galaxy -- have been the hidden engine of the highest achievements in science and technology.
-
-
Wow!
- De Eric en 08-13-10
De: Leonard Mlodinow
-
The Man Who Knew Infinity
- A Life of the Genius Ramanujan
- De: Robert Kanigel
- Narrado por: Humphrey Bower
- Duración: 17 h y 26 m
- Versión completa
-
General
-
Narración:
-
Historia
In 1913, an unschooled young Indian clerk wrote a letter to G. H. Hardy, begging that preeminent English mathematician's opinion on several ideas he had about numbers. Hardy, realizing the letter was the work of a genius, arranged for Srinivasa Ramanujan to come to England. Thus began one of the most remarkable collaborations ever chronicled.
-
-
Thorough and Enjoyable
- De Roger en 05-23-08
De: Robert Kanigel
-
Your Brain Is a Time Machine
- The Neuroscience and Physics of Time
- De: Dean Buonomano
- Narrado por: Aaron Abano
- Duración: 8 h y 51 m
- Versión completa
-
General
-
Narración:
-
Historia
In Your Brain Is a Time Machine, brain researcher and best-selling author Dean Buonomano draws on evolutionary biology, physics, and philosophy to present his influential theory of how we tell and perceive time. The human brain, he argues, is a complex system that not only tells time but creates it; it constructs our sense of chronological flow and enables "mental time travel" - simulations of future and past events.
-
-
Great book on an underrated subject
- De Neuron en 05-09-17
De: Dean Buonomano
-
Business Biographies and Memoirs - Titans of Industry: Andrew Carnegie, J.P. Morgan, John D. Rockefeller, Henry Ford, Cornelius Vanderbilt
- De: J.R. MacGregor
- Narrado por: Kevin Kollins
- Duración: 14 h y 40 m
- Versión completa
-
General
-
Narración:
-
Historia
The five Titans of Industry discussed in this series are, without a doubt, the most influential and impactful men in American history. Without any one of them, the entire landscape of the US would be different. They are the founders of the American economy.
-
-
Loved this book
- De Ruby Sanderson en 09-14-19
De: J.R. MacGregor
-
Existential Physics
- A Scientist's Guide to Life's Biggest Questions
- De: Sabine Hossenfelder
- Narrado por: Gina Daniels
- Duración: 8 h y 7 m
- Versión completa
-
General
-
Narración:
-
Historia
Not only can we not currently explain the origin of the universe, it is questionable we will ever be able to explain it. The notion that there are universes within particles, or that particles are conscious, is ascientific, as is the hypothesis that our universe is a computer simulation. On the other hand, the idea that the universe itself is conscious is difficult to rule out entirely.
-
-
Unscientific and unengaging
- De Jase G en 03-29-23
-
Spy Secrets That Can Save Your Life
- A Former CIA Officer Reveals Safety and Survival Techniques to Keep You and Your Family Protected
- De: Jason Hanson
- Narrado por: Jason Hanson
- Duración: 6 h y 17 m
- Versión completa
-
General
-
Narración:
-
Historia
The New York Times best seller that reveals the safety, security, and survival techniques that 99 percent of Americans don’t know - but should. When Jason Hanson joined the CIA in 2003, he never imagined that the same tactics he used as a CIA officer for counter intelligence, surveillance, and protecting agency personnel would prove to be essential in every day civilian life. In his engaging and empowering book Spy Secrets That Can Save Your Life, Jason shares this know-how with listeners.
-
-
Fantastic, Practical and Useful Information
- De Sara en 10-08-15
De: Jason Hanson
-
Journey to the Edge of Reason
- The Life of Kurt Gödel
- De: Stephen Budiansky
- Narrado por: Bob Souer
- Duración: 8 h y 52 m
- Versión completa
-
General
-
Narración:
-
Historia
Nearly a hundred years after its publication, Kurt Gödel's famous proof that every mathematical system must contain propositions that are true - yet never provable - continues to unsettle mathematics, philosophy, and computer science. Yet unlike Einstein, with whom he formed a warm and abiding friendship, Gödel has long escaped all but the most casual scrutiny of his life.
-
-
Interesting story of a great mathematician
- De James Orlin en 04-28-22
-
The Quantum Labyrinth
- How Richard Feynman and John Wheeler Revolutionized Time and Reality
- De: Paul Halpern
- Narrado por: Brian Troxell
- Duración: 10 h y 44 m
- Versión completa
-
General
-
Narración:
-
Historia
In 1939, Richard Feynman, a brilliant graduate of MIT, arrived in John Wheeler's Princeton office to report for duty as his teaching assistant. A lifelong friendship and enormously productive collaboration was born, despite sharp differences in personality. The soft-spoken Wheeler, though conservative in appearance, was a raging nonconformist full of wild ideas about the universe. The boisterous Feynman was a cautious physicist who believed only what could be tested. Yet they were complementary spirits.
-
-
Neither Fish Nor Fowl
- De Brooklyn en 12-02-17
De: Paul Halpern
-
Angela's Ashes
- De: Frank McCourt, Jeannette Walls - introduction
- Narrado por: Frank McCourt, Jeannette Walls - introduction
- Duración: 15 h y 8 m
- Versión completa
-
General
-
Narración:
-
Historia
Why we think it’s a great listen: There’s no gentle way to put this – Frank McCourt’s performance of Angela’s Ashes is just better than the Pulitzer Prize-winning book. Frank McCourt shares his sometimes heartwarming, sometimes heartbreaking story of growing up poor, Irish, and Catholic in the Pulitzer Prize-winning memoir Angela's Ashes.
-
-
A classic book *and* a classic audiobook
- De Karen en 01-30-03
De: Frank McCourt, y otros
-
A Beautiful Mind
- De: Sylvia Nasar
- Narrado por: Anna Fields
- Duración: 18 h y 12 m
- Versión completa
-
General
-
Narración:
-
Historia
John Forbes Nash, Jr., a prodigy and legend by the age of 30, dazzled the mathematical world by solving a series of deep problems deemed "impossible" by other mathematicians. But at the height of his fame, Nash suffered a catastrophic mental breakdown and began a harrowing descent into insanity, resigning his post at MIT, slipping into a series of bizarre delusions, and eventually becoming a dreamy, ghostlike figure at Princeton, scrawling numerological messages on blackboards.
-
-
Informative not entertaining
- De Jim "The Impatient" en 08-28-11
De: Sylvia Nasar
-
The Chosen
- De: Chaim Potok
- Narrado por: Jonathan Davis
- Duración: 10 h y 37 m
- Versión completa
-
General
-
Narración:
-
Historia
Though they've lived their entire lives less than five blocks from each other, Reuven Malter and Danny Saunders exist in very different worlds. Reuven blends easily into both his secular Jewish faith and his typical American teen life, while Danny's conservative Hasidic clothes and appearance make him stick out in any crowd. Their improbable friendship teaches them that the differences separating people through cultures and generations are never as great as they seem.
-
-
truly rates overused "classic" label
- De connie en 11-05-08
De: Chaim Potok
-
Look Me in the Eye
- My Life with Asperger's
- De: John Elder Robison
- Narrado por: Mark Deakins
- Duración: 9 h y 16 m
- Versión completa
-
General
-
Narración:
-
Historia
Ever since he was small, John Robison had longed to connect with other people, but by the time he was a teenager, his odd habits, an inclination to blurt out non sequiturs, avoid eye contact, dismantle radios, and dig five-foot holes, had earned him the label "social deviant". No guidance came from his mother or his father. It was no wonder he gravitated to machines, which could, at least, be counted on.
-
-
Interesting autobiography; not autism-informative
- De Steener en 03-13-15
-
Lion
- De: Saroo Brierley, Larry Buttrose
- Narrado por: Vikas Adam
- Duración: 7 h y 28 m
- Versión completa
-
General
-
Narración:
-
Historia
At only five years old, Saroo Brierley got lost on a train in India. Unable to read or write or recall the name of his hometown or even his own last name, he survived alone for weeks on the rough streets of Calcutta before ultimately being transferred to an agency and adopted by a couple in Australia. Despite his gratitude, Brierley always wondered about his origins. Eventually, with the advent of Google Earth, he had the opportunity to look for the needle in a haystack he once called home.
-
-
Listen on higher speed
- De Dom en 04-06-17
De: Saroo Brierley, y otros
-
We Are All Completely Beside Ourselves
- De: Karen Joy Fowler
- Narrado por: Orlagh Cassidy
- Duración: 8 h y 57 m
- Versión completa
-
General
-
Narración:
-
Historia
Meet the Cooke family: Mother and Dad, brother Lowell, sister Fern, and Rosemary, who begins her story in the middle. She has her reasons. “I was raised with a chimpanzee”, she explains. “I tell you Fern was a chimp and already you aren’t thinking of her as my sister. But until Fern’s expulsion...she was my twin, my funhouse mirror, my whirlwind other half and I loved her as a sister”. As a child, Rosemary never stopped talking. Then, something happened, and Rosemary wrapped herself in silence.
-
-
This was totally worth the credit.
- De Amber en 10-04-13
De: Karen Joy Fowler
-
Best Boy
- A Novel
- De: Eli Gottlieb
- Narrado por: Bronson Pinchot
- Duración: 7 h y 20 m
- Versión completa
-
General
-
Narración:
-
Historia
Sent to a "therapeutic community" for autism at the age of 11, Todd Aaron, now in his '50s, is the "old fox" of Payton Living Center. A joyous man who rereads the encyclopedia compulsively, he is unnerved by the sudden arrivals of a menacing new staffer and a disruptive, brain-injured roommate. His equilibrium is further worsened by Martine, a one-eyed new resident who has romantic intentions and convinces him to go off his meds to feel "normal" again.
-
-
Good but with a Couple O' Caveats...
- De Gillian en 04-27-16
De: Eli Gottlieb
-
The Lowland
- De: Jhumpa Lahiri
- Narrado por: Sunil Malhotra
- Duración: 13 h y 3 m
- Versión completa
-
General
-
Narración:
-
Historia
Born just fifteen months apart, Subhash and Udayan Mitra are inseparable brothers, one often mistaken for the other in the Calcutta neighborhood where they grow up. But they are also opposites, with gravely different futures ahead. It is the 1960s, and Udayan—charismatic and impulsive—finds himself drawn to the Naxalite movement, a rebellion waged to eradicate inequity and poverty; he will give everything, risk all, for what he believes.
-
-
My least favorite of all her work.
- De SAK en 10-09-13
De: Jhumpa Lahiri
-
Mosaic
- De: Diane Armstrong
- Narrado por: Deidre Rubenstein
- Duración: 19 h y 56 m
- Versión completa
-
General
-
Narración:
-
Historia
>i>Mosaic is compelling storytelling at its best - from the fascinating details of Polish-Jewish culture and the rivalries and dramas of family life, to its moving account of lives torn apart by war and persecution, this an extraordinary true story of a family, and of one woman's journey to reclaim her heritage.
-
-
Absolutely excellent!
- De Roberta en 09-22-11
De: Diane Armstrong
Lo que los oyentes dicen sobre The Prodigy
Con calificación alta para:
Reseñas - Selecciona las pestañas a continuación para cambiar el origen de las reseñas.
-
Total
-
Ejecución
-
Historia
- Amazon Customer
- 12-23-21
good listen
very interesting story . a story of a child prodigy brought down by media. it
Se ha producido un error. Vuelve a intentarlo dentro de unos minutos.
Has calificado esta reseña.
Reportaste esta reseña
-
Total
-
Ejecución
-
Historia
- D. Jones
- 08-19-16
Well written...
...but repetitive in places. It was clear to me that WJ Sidis was a genius, but also had a high functioning form of Autism. This book would have better served to have at least included this as a possibility, especially in the epilogue when the author explored the real reasons for his misunderstood life. It would have been interesting had he been born into today's world. The unfortunate thing would have been in today's nationalism and prejudice, he may have been treated much the same way. Today too is the tendency for a conservative nationalistic trend to denigrate intellectualism, just as Billy experienced in his time. He would have been a great person to know.
Se ha producido un error. Vuelve a intentarlo dentro de unos minutos.
Has calificado esta reseña.
Reportaste esta reseña
esto le resultó útil a 1 persona
-
Total
-
Ejecución
-
Historia
- Tom B.
- 05-13-12
A tarnished national treasure lost forever
Where does The Prodigy rank among all the audiobooks you’ve listened to so far?
Among biographies, this book ranks highly and is very thorough in its treatment of the subject. A very worthwhile listen and the best that I've heard this year.
What was the most compelling aspect of this narrative?
The relationship with his sister Helena was perhaps the most uplifting as she was the one person in the family who never turned her back on her brother.
What does Aze Fellner bring to the story that you wouldn’t experience if you just read the book?
He does a very good job of keeping the listener enthralled throughout the telling of the story. There are only two small slips of the audio whereby a sentence is repeated twice.
Did you have an extreme reaction to this book? Did it make you laugh or cry?
The book kept me captivated throughout and also served as a cautionary tale for me as a father.
Any additional comments?
The author is almost completely silent on why the father was never mentioned again, either positively or negatively after his passing. This was surprising, since the relationship seems to have been much stronger than that of the one between William and his mother.
Se ha producido un error. Vuelve a intentarlo dentro de unos minutos.
Has calificado esta reseña.
Reportaste esta reseña
esto le resultó útil a 5 personas
-
Total
-
Ejecución
-
Historia
- Douglas
- 09-10-18
Amazing Biography...
of perhaps the greatest scientific and mathematical genius of all time--and how his parents and a malicious press made it all go terribly wrong. An enlightening and sobering read.
Se ha producido un error. Vuelve a intentarlo dentro de unos minutos.
Has calificado esta reseña.
Reportaste esta reseña
esto le resultó útil a 3 personas
-
Total
-
Ejecución
-
Historia
- rodrigober
- 11-30-15
Great book
Great book of a personal hero I love the story and the deep of the information
Se ha producido un error. Vuelve a intentarlo dentro de unos minutos.
Has calificado esta reseña.
Reportaste esta reseña
esto le resultó útil a 1 persona
-
Total
-
Ejecución
-
Historia
- oliverVT
- 08-22-22
Intriguing
A really interesting story about a man who could have been so much more if only the media and others let him be.
Se ha producido un error. Vuelve a intentarlo dentro de unos minutos.
Has calificado esta reseña.
Reportaste esta reseña
-
Total
-
Ejecución
-
Historia
- Dal
- 08-06-12
The Human Brain is a Complex Thing
What happened to William James Sidis is not surprising. Sad, yes, but nothing as complex as the human brain can be predictable. He had great potential as a child but so did Bobby Fischer, the greatest chess player of all time. Both, after amazing feats of brilliance, burned out. "Endgame" can be found at Audible.
If you get a chance, listen to both "The Prodigy" and "Endgame" and compare these two brilliant, but ultimately tragic men. There are many similar examples.
Se ha producido un error. Vuelve a intentarlo dentro de unos minutos.
Has calificado esta reseña.
Reportaste esta reseña
esto le resultó útil a 2 personas
-
Total
-
Ejecución
-
Historia
- Anonymous
- 08-14-21
Fascinating story that reads like a novel.
This is the story of a man with an IQ of around 300. The story flows like a steady stream carrying the characters forward through personal whirlpools. The narrator is a gifted storyteller.
Se ha producido un error. Vuelve a intentarlo dentro de unos minutos.
Has calificado esta reseña.
Reportaste esta reseña
-
Total
-
Ejecución
-
Historia
- Kindle Customer
- 10-14-19
Great Book about a sad loss.
This was a great book about a sad loss of human potential and societies insecurities and prejudices.
Se ha producido un error. Vuelve a intentarlo dentro de unos minutos.
Has calificado esta reseña.
Reportaste esta reseña
-
Total
-
Ejecución
-
Historia
- Cormac Canales
- 08-01-20
Both an inspiration and a caution
The story was simultaneously interesting, inspirational, and sad.
It starts with a brief introduction to Sarah and Boris Sidis, William's parents, who were both 19th century Russian-Jewish immigrants. As a teen in czarist Russia, Boris had been arrested & placed in solitary confinement for teaching peasants to read; this ultimately led to him emigrating to America under a "plea bargain" of sorts. Sarah was a victim of the pogroms; during one brutal instance of mob violence when she was just 8, her house was ransacked and she was forced to hide in an old chimney after being separated from her family. Her family thus decided to flee Russia for America. Sarah & Boris independently settled in Boston for the same reason: they had heard it was a part of America where education was highly valued.
A reader can thereby easily see the origins of their love of education, their pacifism, egalitarianism, and concern for the downtrodden; qualities which William would keenly absorb in his upbringing. For instance, when he is one year old and barely able to speak, William tells his parents that his favorite thing in the world is the front door, because when it opens he meets new people.
Sarah and Boris together raise William using "the Sidis method". On paper it seems sound: teach children to understand the fundamentals of a subject so well that they can derive more complex things in that subject without memorizing. Supposedly, this enabled William to learn any language in a matter of weeks and master non-Euclidean geometry by age 10. He later entered Harvard at age 11, and his record as being the University's youngest entrant still stands to this day. Sarah and Boris saw his success as proof their method could work on any child, and might lead to a quasi-utopia if mass-implemented in early education. Sarah had planned to publish a "how-to" guide on implementing the Sidis method, but never did so, and only a few pages of the first draft survive to this day.
Reading between the lines, there are some hints of emotional abuse, or at least manipulation, in Sidis' upbringing. The accounts that Sarah would put guests--and even the children of guests--to work on her property when they would visit leads me to wonder if she saw everyone around her as expendable. She even at one point tried to impose the Sidis method on her nieces and nephews (including a young Clifton Fadiman), to the chagrin of their parents. Needless to say, people tended to avoid her company. There is also the disturbing tale of how William's parents threatened to institutionalize him for participating in a May Day parade that turned violent, even though William's arrest amounted to little more than a misdemeanor charge that only saw him spend a few nights in jail. This strikes me as being the moment where William decided to distance himself from them and almost everything they taught him permanently, including the love of education (he worked as a mere bookkeeper for the rest of his life).
In a particularly sad tangential chapter, the author recounts the lives of child prodigies from earlier centuries, many of whom either died before adulthood or amounted to little (the most notable exception being John Stuart Mill, who seems an intellectual forebear of Sidis).
The audiobook narration was OK. A few times a sentence was repeated in its entirety, but I don’t know if that was because of a misprint in the book itself, or clumsy narration. But it wasn’t too bothersome.
Sidis’s story is recommended for those who hope to one day raise an exceptional or above average child through “nurture”: both as a partial guide (some of the “Sidis Method” remains good advice for a child’s intellectual growth), and a cautionary tale. I would be very interested in knowing if there exists a "right" way to do the Sidis method or if it was doomed from the start. But that is a future project for an intrepid Doctor of Education or Psychologist.
Se ha producido un error. Vuelve a intentarlo dentro de unos minutos.
Has calificado esta reseña.
Reportaste esta reseña
esto le resultó útil a 2 personas