We like to think of ourselves as self-aware, reflective beings, but psychological studies demonstrate that we’re usually overconfident in the accuracy of our own beliefs. Memory, for example, can be extremely unreliable, even when we feel certain we know what happened. Surprisingly, when we’re made aware of this, we adjust our level of confidence in ourselves only slightly. How, then, can we doubt ourselves in a rational and efficient manner to bring our beliefs closer to reality?