The author of a new book says scientists have forgotten how to be wrong. “In any branch of science there are only two possibilities. There is either nothing left to discover, in which case, why work on it, or there are big discoveries yet to be made, in which case, what the scientists say now is likely to be false. The problem is, the top scientists seem to have forgotten that. The result is a generation of scientists who have become a little too confident that their understanding of the world is more scientifically accurate than it will be proved to be.”