The third chapter concerns Penrose's more controversial ideas, bringing in Godels theorem, artificial intelligence and non-periodic tiling, which and makes an entertaining read, even if you don't believe the claims. The first three chapters make up the bulk of the book. At the end there are comments on Penrose's ideas from Abner Shimony, Nancy Cartwright and Stephen Hawking and a reply to these comments from Penrose. This last section is somewhat different in style from the rest, comprising mostly philosophical discussions."; include "amazinf.php"; ?>