(Professor Jim Al-Khalili signing books after the Turing lecture)
On Thursday night I attended a special guest lecture at Edinburgh University’s George Square Theatre, organised by the Edinburgh Royal Society, with author, theoretical physicist and broadcaster (he’s presented some excellent science documentaries on the BBC and C4) Professor Jim Al-Khalili. It was part of a series of events going on this year to mark 100 years since one of the great minds of the 20th century, Alan Turing, was born. I’ve always been a huge admirer of Turing – the father of computing and Artificial Intelligence, working out systems on pencil and paper before he and his colleagues, along with the GPO’s hugely gifted electronic engineer Tommy Flowers, created the world’s first electronic computer, a device so secret it was classified for decades while publicly others took the glory for ‘first’ computers later. Because they used this to help break the Nazi Enigma codes, without which the Second World War might have taken many more years of hard struggle and countless thousands more lives. He and his Bletchley Park colleagues were, in a real sense, war heroes, just not the sort who carry a rifle into combat, but utterly essential to the defeat of the Axis and the safeguarding of free civilisation. Turing was also a gifted visionary who was able to conceive of using science and mathematics to model thought processes years before others, giving new pathways to exploring both computing technology then emerging as well as understanding more how the incredibly complex human brain works and how that could be applied to machines, if they too could be make to think, each step along that road revealing more about the astonishing complexity of our own minds than that of our complex technology.
Sadly in the 50s Turing, a homosexual man, was arrested, homosexuality being illegal at the time, stripped of his security clearance despite his wartime record and given a choice of chemical castration or prison. He took the former but was never the same; depressed he took his own life with an arsenic laced apple. So little appreciation from the government of the country he had helped save with his genius and dedication and a reminder today when we see some clergy and politicians making unsavoury remarks about gay people how such comments can lead to attitudes and actions which can take lives, to the detriment of all of society… Turing remains one of my scientific heroes, though, and I was pleased that a public campaign a couple of years ago resulted in the then Labour government of Gordon Brown publishing an official apology for the way Turing had been treated back in the Britain of the 50s.