Every January the intellectual impresario and literary agent John Brockman (who represents me, I should disclose) asks a large group of thinkers a single question on his website, edge.org. This year it is: “What do you think about machines that think?” [6] There are lots of interesting answers, ranging from the skeptical to the apocalyptic.

I’m not sure that asking whether machines can think is the right question, though. As someone once said, it’s like asking whether submarines can swim. But we can ask whether machines can learn, and especially, whether they can learn as well as 3-year-olds. ...