“At the simplest level, memory smooths out the wrinkles of dissonance by enabling the confirmation bias to hum along, selectively causing us to forget discrepant, disconfirming information about beliefs we hold dear. If we were perfectly rational beings, we would try to remember smart, sensible ideas and not bother taxing our minds by remembering foolish ones. But dissonance theory predicts that we will conveniently forget good arguments made by an opponent, just as we forget foolish arguments made by our own side.”