What is the function of rationality? How much efficiency is lost to irrational impulses? How can a person overcome these natural irrationalities? These are the questions posed by the Center for Applied Rationality (CFAR), an organization dedicated to learning how to use your brain to the best of its ability. This is managed by training it in rationality, defined by founder Anna Salamon as “the ability to form accurate beliefs in confusing contexts, and achieve one’s goals.” The CFAR’s website elaborates to explain that they make no pretenses towards aiming for “perfect” rationality, which is an entirely theoretical concept, but instead…