You’re two years into a degree you hate. You’ve already invested thousands of dollars and countless hours. The rational move is to cut your losses and switch to something you actually care about. Instead, you think ‘I’ve already put in so much, I can’t quit now.’ So you spend two more years being miserable, graduate with a degree you’ll never use, and enter a career that drains you. All because you couldn’t walk away from money and time that was already gone. This is the sunk cost fallacy, one of the most destructive cognitive biases in human decision-making. It’s the...