This is the final exam for Circle of Competence. It pulls the whole course together: why the edge matters more than the area, the danger band that sits just past your boundary, the instruments that map your circle without trusting the feeling of competence, how to widen for real instead of faking range, and the discipline of saying “I don’t know” under pressure. Take your time — several questions look easy until you spot the trap.
How this exam works
Read carefully — this exam is final. Each question appears one at a time. Once you submit an answer it is locked for good: there’s no going back, no retry, and no restart. Your score is hidden until the end, where you’ll see a pass/fail verdict. The pass mark is 70%. A few questions ask you to select all correct answers.
What is a "circle of competence," precisely?
Select an answer to continue.
Course Recap
Big picture
The whole circle, in one picture
- Circle of Competence
- The edge, not the area
- A small sharp circle beats a big fuzzy one — the boundary is what matters
- The danger zone
- The band just past your edge, where confidence outruns competence
- Mapping your circle
- Keep score, the "what would I need to know?" test, the teach test — not the feeling
- Widening without faking
- Grow via deliberate study and feedback over time; would you bet on it?
- Staying inside under pressure
- Passing costs a bounded gain; bluffing risks unbounded ruin — a margin of safety
- The edge, not the area
Key takeaways
A circle of competence is the set of subjects where your mental maps are accurate enough to trust your own judgment — and the whole model lives in its edge, not its area. A small sharp circle beats a big fuzzy one, because the real danger is the band just past your boundary, where things still feel familiar and confidence keeps climbing after competence has stopped. You cannot map that boundary by how competent something feels (the feeling is systematically inflated); you map it with instruments — scorekeeping with real probabilities, the “what would I need to know?” test, the teach test, and a wary eye on lucky wins. Your circle can widen, but only the honest way: deliberate study and real feedback over time, never name-dropping, borrowed conviction, or the halo effect. And under pressure — FOMO, authority, ego, social proof — staying inside is rational because the asymmetry is brutal: passing costs a bounded forgone gain, while bluffing across your edge risks unbounded loss. Know where your competence stops, act inside it, widen it slowly, and pass cleanly outside it — that is a margin of safety you build for yourself.