Most people treat their beliefs like possessions. Once formed, beliefs are defended, protected, and rarely surrendered without a fight. This is not stupidity or stubbornness. It reflects how human cognition evolved. Our ancestors needed stable mental models of the world to act decisively, and constant belief revision would have been paralyzing. But in a complex modern world where information arrives continuously and the stakes of being wrong are high, the instinct to defend beliefs rather than revise them becomes a serious liability. Bayesian thinking offers a fundamentally different relationship with belief. Instead of treating beliefs as fixed positions to be...