“Trust your instincts!” “Go with your gut!” These popular nuggets of advice appeal to something deep in our nature—a distaste for unresolved complexity. We want solutions, and we want them fast. The trouble is that, with the possible exception of what to do when attacked by a tiger, our brains are notoriously bad at making quick decisions.Kahneman and Tversky called our gut instincts “system 1 thinking” and our slower, rational thought processes “system 2”. It’s not that system 1 is al...