Do you know what you don't know?
Epistemic humility measures your calibration — whether your confidence matches your accuracy. When you say you're 80% sure, are you right 80% of the time? It's the difference between knowing what you don't know and being confidently wrong.
Overconfidence kills more decisions than ignorance. The person who says 'I'm not sure, let me check' is more valuable than the person who confidently gives the wrong answer. In an age of information overload, the ability to accurately assess your own certainty is a superpower.
The Iraq WMD intelligence failure wasn't a lack of information — it was a lack of calibrated confidence. Analysts were highly confident in conclusions that turned out to be wrong. Better epistemic humility — 'we're 60% confident, not 95%' — would have changed history.
Studies show doctors are correct about 85% of the time when they say they're 'certain' of a diagnosis. That 15% gap kills people. The best doctors aren't the most confident — they're the most accurately calibrated about when they might be wrong.
You answer factual questions and rate your confidence on each. Your epistemic humility score is a Brier score — the mathematical relationship between your confidence levels and your actual accuracy. Perfect calibration means your 70% confident answers are right 70% of the time.
For one week, every time you state an opinion or fact, internally rate your confidence (50%, 70%, 90%). At the end of the week, check which ones you were right about. Most people discover they're significantly overconfident. The goal isn't to be less confident — it's to be accurately confident.