The Feynman Technique: Understanding Through Explanation

The Technique in Brief

Nobel physicist Richard Feynman identified a reliable test for understanding: if you cannot explain something simply, you do not yet understand it. The technique that bears his name formalises this: explain a concept in plain language, identify where you get stuck, return to the source material for those gaps, and repeat until the explanation is complete and clear.

The Four Steps

1. Choose a concept to learn
2. Explain it in plain language as if teaching a 12-year-old -- no jargon, no assumed background knowledge
3. Identify the gaps: where did you use jargon because you did not know the simpler explanation? Where did you skip a step because you were not sure how it worked?
4. Return to the source material for those gaps, then repeat the explanation

Why It Works

Translation forces understanding. You can repeat technical language without knowing what it means. You cannot explain the thing in plain terms without knowing what the terms refer to. The translation requirement exposes the difference between familiarity and comprehension.

Applications Beyond Study

The Feynman technique is as useful in professional contexts as in formal learning. Before presenting a concept to colleagues or clients, apply the technique: if you cannot explain it without jargon, you do not yet understand it well enough to advocate for it confidently.

Understanding Through Explanation in Practice

Pick one concept you believe you understand. Explain it out loud to an imaginary 12-year-old. Notice where you reach for complexity to cover gaps. Those gaps are your next study targets.