Posted Nov 6, 2014, 10:28 PM
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Join Date: Mar 2009
Location: Wiltshire, England
Posts: 1,938
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XLVI Alan Turing
Alan Turing was the man who learnt to think like a computer before computers existed; he gave the Allies a crucial advantage in World War II with his work on code breaking; he defined the concept of artificial intelligence; and in 1952 he was chemically castrated by the British authorities for being a homosexual.
In 1936, he developed an approach to logic that used an imaginary calculating machine directed by algorithmns. In doing this, he laid out the theoretical basis for computer science.
Historical accounts differ about the extent to which Turing's ideas gave rise to modern computers, but in a sense, whether he invented computers or not, Turing himself was the first computer, in the way he disciplined his mind to operate in a way that machines could imitate.
For example, in 1952 he wrote a chess program that required more processing power than any of the prototype machines of the time could generate. Undeterred, he played a game where he operated as the computer, taking half an hour to perform the calculations needed for each move.
During the war, he played a leading role in cracking German codes. According to one colleague:
'In 1940/41 the German U-boats were sinking our food ships... left right and centre, and there was nothing to stop this until Turing managed to break naval Enigma, as used by the U-boats....
'If that hadn’t happened, it is entirely possible, even probable, that Britain would have been starved and would have lost the war.'
But in 1952 the police discovered that Turing had been involved in a homosexual relationship. To avoid imprisonment, he agreed to be chemically castrated. By 1954, this 'treatment' was over, but Turing was found dead in his home, poisoned by cyanide. It is unclear whether or not he committed suicide.
As the story of Turing's work during the war has gradually come to light, his reputation has grown.
In 1998 a Blue Plaque was unveiled at his birthplace in the sleepy neighbourhood of Maida Vale.
In 2009 Turing received an apology from the Prime Minister. It ran:
'Turing was a quite brilliant mathematician, most famous for his work on breaking the German Enigma codes. It is no exaggeration to say that, without his outstanding contribution, the history of the Second World War could have been very different. He truly was one of those individuals we can point to whose unique contribution helped to turn the tide of war. The debt of gratitude he is owed makes it all the more horrifying, therefore, that he was treated so inhumanely.
'In 1952, he was convicted of "gross indecency" – in effect, tried for being gay. His sentence – and he was faced with the miserable choice of this or prison – was chemical castration by a series of injections of female hormones. He took his own life just two years later.
'...his treatment was of course utterly unfair, and I am pleased to have the chance to say how deeply sorry I and we all are for what happened to him. Alan and the many thousands of other gay men who were convicted, as he was convicted, under homophobic laws, were treated terribly.'
Four years later Turing was given a Royal Pardon, but this was not extended to the many thousands of other gay men who were convicted.
Could there be an algorithm for reconciliation?
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