How will we face being defeated by machines?

That's the question at the heart of the documentary AlphaGo, about an AI program designed to play the ancient Chinese board game Go. Fan and Lee are forced to answer this question as they're overwhelmed by AlphaGo's uncanny play style. If you don't remember how the matches went, I won't spoil the film for you, but suffice to say that humanity does land at least one blow on the machines, through Lee's so-called "divine move" -- Go terminology for a play that is both unexpected and entirely original. But while this works in the context of Lee's battle with DeepMind's AI, it feels a little limited with regards to the wider challenges posed by artificial intelligence.