This was a big best-seller for Gladwell. He posits that much of the time we make decisions, reach conclusions in a sort of pre-conscious manner that he calls “thin-slicing.” That means taking a very small sample, a thin slice, and making a decision immediately based on that information. However, it is the case that the ability to evaluate that slice is fed by a lifetime of experience. It is not simply, as some, including the President, might believe, that using one’s gut, in the absence of years and years of preparation, is as valid a way of reaching decisions as taking the longer route of careful analysis of available data. No, no, no.