Avoiding Bias: The Most Common Thinking Errors

About two out of three entrepreneurs are sure their start‑up will beat the odds—most are wrong. Now zoom in: you’re choosing a doctor, a job offer, or a headline to trust. In each case, tiny thinking errors quietly tip the scales, long before you feel you’ve “made up your mind.”

A strange thing about these mental misfires: they rarely feel like errors from the inside. Overconfident founders don’t feel reckless; they feel “sure.” Someone deep in a losing project doesn’t feel irrational; they feel “committed.” And when a news story fits our beliefs a little too well, it feels less like bias and more like “finally, something that makes sense.”

What’s going on isn’t random flukes, but patterns—reliable ways our brains lean when evidence is messy or incomplete. In fast, low‑stakes situations, those patterns are often good enough. But as the stakes rise—career moves, medical choices, financial bets—the same shortcuts quietly nudge us away from reality.