My favorite Edsger Dijkstra aphorism is this one: “The question of whether machines can think is about as relevant as the question of whether submarines can swim.” Yet we keep playing the imitation game: asking how closely machine intelligence can duplicate our own intelligence, as if that is the real point. Of course, once you imagine machines with human-like feelings and free will, it’s possible to conceive of misbehaving machine intelligence—the AI as Frankenstein idea. This notion is in the midst of a revival, and I started out thinking it was overblown. Lately I have concluded it’s not.