Do you really believe in facts? Or are you just believing what you want to believe? In this episode, we talk about something called Bayesian Updating – a fancy way of saying how your brain mixes your past beliefs (priors) with new evidence to make decisions. But here’s the twist: your priors (like what your family, school, or culture told you) can change how you see the evidence! We use a fun example with an aptitude test and talk about how your bias can sneak in, even if you think you're being smart.

Learn why people sometimes ignore good data, how your brain builds beliefs, and why you should always check if your thinking is based on facts or old stories. This episode connects to lots of cool Future IQ topics like bad decisions, groupthink, preference falsification, and costly signaling. So if you understand this, the rest will make WAY more sense!