SCIENCE

Alan Turing: His Mind, His Life (VIDEO, Part Two)

In honor of the 100th anniversary of mathematician and logician Alan Turing's birth, the final installment of a two-part series explores the life of Turing as told by some of the most influential computer scientists in the world.

At the Association for Computing Machinery's 2012 Turing Award celebration, I discussed Turing, the father of computer science, with Frances Allen, Charles Bachman, Vint Cerf, Dame Wendy Hall, William Newman, Christos Papadimitriou and Judea Pearl.

Click the link below and/or watch the video above to hear their stories--and please view Part 1 of “Alan Turing: His Mind, His Life” below.

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WENDY HALL: I think he’s one of those people that lived to work. I mean that was his driving force, but of course he had, you know, a personal life and a sexual life outside of that.

CHRISTOS PAPADIMITRIOU: So Turing was homosexual and in England of the mid-19th, 20th Century. This was trouble, okay. It was explicitly a punishable offense.

VINT CERF: He was accused of practicing homosexuality, and that was considered a crime.

WH: He actually really told the police he was a homosexual. He, you know, and there’s a lot of conjecture that he really wanted to come out.

CP: Turing did his science as if he lived 50 years ahead of his time. Unfortunately he lived his personal life the same way.

CHARLES BACHMAN: When he was tried for the crime of homosexuality, he had the choice of going to prison in one sentence or to be chemically castrated, which sounds like a pretty horrible thing to happen.

CP: There was a burglary his home, and when the constable asked him, “Do you have any thoughts about who might have done it?” He said, “Yes, I suspect this person.” And he asked him, “Is he any relation of yours?” He said, “Yes, he was my lover.”

WILLIAM NEWMAN: Up until that point he was very happy, he was. He had moved to Manchester to work with my father in the mathematics department and this I think was probably his first real move away from King’s College in Cambridge where he really was at home.

CP: He had to submit to.. I’m sorry, I got emotional about that. He had to submit to hormone treatment, which had terrible transformative effects on his mind and body, and pushed him to suicide.

WH: When he was arrested and tried and found guilty, he chose--I mean this sounds appalling to us, it’s only the ‘50s--he chose chemical castration instead of going to jail.

CB: He did a lot of chemical experiments so having cyanide in the house was not unusual.

WH: That plays with your mind as well as your body, I imagine.

WN: My father was still working in Manchester and he telephoned my mother in Cambridge and I was sitting in the same room, and I could see some really terrible news was coming through.

JUDEA PEARL: Until you are in the shoes of the person, you don’t know. It could be a thousand things, a thousand things could have passed in his mind.

WH: There’s something about him liking the Snow White fairy story, fairy tale, and you know the poisoned apple that the queen eats in the fairy tale.

CP: He crafted his suicide in a way, I believe, that made it obvious to everybody that he killed, that he took his own life, except his mother who died believing that it was an accident.

WN: You know, this was a really tough time for my parents, and very distressing and sad for me. It was very confusing.

CP: I suspect that he did this deliberately and I believe this was his last brilliant construct.

WN: My name’s William Newman, and I was a friend of Alan Turing’s in the period after the war.

CP: My name is Christos Papadimitriou, and I’m a creation of Alan Turing.

JP: My name is Judea Pearl, and Alan Turing affected me indirectly by asking the questions that I was afraid to ask.

WH: My name is Dame Wendy Hall. I was one year old when Turing died but my career has been interestingly interwoven with his legacy.

JP: The question in my case was, how can we people manage to handle uncertainty so easily and so comfortably and machines can not?

VC: My name is Vint Cerf, and had Alan Turing not done what he did, I wouldn’t have programmed the first computer I put my hands on in 1960.

WH: I’m a computer scientist so clearly, you know, my career exists because of the work he did.

WN: He’s sort of like an uncle to me.

CP: Everything that I am--a scientist, a storyteller, a man who lives his life as consistently as possible--has been affected tremendously by Alan Turing.

Video produced by Christopher Sprinkle and Cara Santa Maria. Shot by Roddy Blelloch. Special thanks to Virginia Gold and the Association for Computing Machinery.

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