A well thought out and information book overall. Most of it is more like a trip back to statistics and logic classes from college. He gives many of the basic principals of logic, rationality vs. irrationality, critical thinking, and correlation and causation. It's a good review if it's been a while since you studied it, or maybe a good introduction to the topics if you haven't. Some of his main points are that we aren't really a rational species, though we should strive to be when we can. Much of the "irrational" ways we think are out of thoughtlessness, myside biases, logical fallacies, and thinking correlation means causation. Everyone is guilty of these. Though many may be a product of our evolution. He writes that way are more evolved to win arguments than to be rational, or to be lawyers than scientists. Overall a pretty good read from Pinker.