From Nick Goddard, Manchester, UK
So Deepmind's artificial intelligence can't add up (13 April, p 12). That reminds me of the late, great Stanislaw Lem, who foresaw this more than 50 years ago in his short story Trurl's Machine. The eponymous inventor creates an eight-storey thinking machine that, when asked to calculate two plus two, thinks for a while and replies “seven”. At least Deepmind's AI didn't try to kill its creators – unlike Trurl's machine.
