Identifying human beings is something we normally think of as a straightforward act of visual perception. It seems like the kind of thing a computer could do. In fact, computers do a good job of it, just by scanning faces. But apparently human beings have a more complicated way of identifying things: not just by how they look but by how they make you feel. At least—to judge by Capgras delusion—that seems to be the case when we’re identifying friends and relatives. Is it the case with lots of other things? Is our recognition of the house we live in and the car
