There's a theory that says that when a society develops artificial intelligence, it's only a matter of time until machines develop a better version of themselves, destroy humanity, and the planet becomes devoid of life and contains only a computer humming away to itself. I think this theory was posited by The Matrix.

We've just got another step closer to that day. Some AI software written by just one man has got within 5% of a passing grade for the Turing Test…