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The Feynman technique is explaining an idea in plain words as if teaching a beginner — the moment you stumble shows the exact gap in your understanding. Examples:
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5 examples of the feynman technique
Teaching to learn Explaining a topic to a friend instantly reveals the parts you don't actually understand.
The 12-year-old test If you can't explain it to a curious twelve-year-old, you don't yet understand it well enough.
Studying from memory Writing answers in simple language from memory beats re-reading highlighted notes.
Onboarding a new hire Asked to explain the system, the newcomer surfaces the parts no one really understands.
Cutting the jargon When you can't hide behind big words, the holes in your knowledge show immediately.
How to spot it in yourself
To check if you really understand something, explain it in plain words to a beginner and watch where you stumble.
Replace highlighting with teaching: write or say the idea out loud until it flows without jargon.
Treat each point you get stuck on as a precise gap to go back and fill, then simplify again.
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