Feynman Technique

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Overview

The Feynman Technique tests whether understanding is genuine (can reproduce, predict, extend) or surface (can recognize, recall jargon). It exploits a cognitive asymmetry: recognizing an explanation is much easier than reproducing it. Feynman's principle: "The first principle is that you must not fool yourself — and you are the easiest person to fool."

Compose with neighbors: first-principles supplies the ground-level understanding Feynman Technique then tests. metacognition monitors your thinking process; Feynman Technique stress-tests the output. critical-thinking evaluates someone else's claimed understanding.

When to Use

• Need to know whether understanding is genuine vs. surface; preparing to teach or make a high-stakes decision; a model is giving wrong predictions
• Someone says: "explain it simply," "teach me like I'm five," "do you really understand this," "what am I missing?"
• Cutting through AI hype: "do I actually understand transformers / embeddings / RAG / agents, or am I just dropping the jargon?"

When NOT to use: Fast decision on a concept already tested; concept too new with no source material for Step 3; concept irreducibly formal — use first-principles instead; evaluating creativity or judgment, not understanding.

Coaching Novices (Adaptive Front Door)