Bayesian Thinking Basics

The most powerful framework for moving from clues to conclusions is Bayesian reasoning — updating your confidence in a hypothesis as new evidence arrives. Instead of asking whether something is true or false, you ask how much more or less likely it became given the latest clue.

A weather forecaster who says 70% chance of rain is practicing Bayesian thinking. When dark clouds appear, the probability updates upward. When the barometer rises, it updates downward. Each piece of evidence shifts the probability rather than proving or disproving the conclusion outright.