Computers inch ever closer to behaving like intelligent human beings—witness the ability of IBM’s Watson to beat the all-time champs of the television quiz show Jeopardy. So far, though, most people would doubt that computers truly “see” a visual scene full of shapes and colors in front of their cameras, that they truly “hear” a question through their microphones, that they feel anything—experience consciousness—the way humans do, despite computers’ remarkable ability to crunch data at superhuman speed.