"I remember his words," recalled Amnon. "He said, 'There is nothing we can do in philosophy. Plato solved too many of the problems. We can't have any impact in this area. There are too many smart guys and too few problems left, and the problems have no solutions.'" The mind-body problem was a good example. How are our various mental events--what you believe, what you think--related to our physical states? What is the relationship between our bodies and our minds? The question was at least as old as Descartes, but there was still no answer in sight--at least not in philosophy. The trouble with philosophy, Amos thought, was that it didn't play by the rules of science."