TO OOCH IS TO ask, Why predict something we can test? Why guess when we can know? Those questions bring us to the end of this section, in which we’ve been studying strategies for fighting the confirmation bias. The basic problem we face, in analyzing our options, is this: We will usually have an inkling of the one that we want to be the winner, and even the faintest inkling will propel us to gather supportive information—and sometimes nothing but supportive information. We cook the books to support our gut instincts.

