The Feynman technique
explaining it in plain language
The Feynman technique is explaining a concept in plain language, then studying the places you stall.
What it is
Pick a concept, write the explanation without jargon, read it back. It is a diagnostic dressed up as a study method: the sentence you cannot finish shows where the understanding is not there.
The name is a nickname applied after the fact. No four-step protocol of this kind comes out of Richard Feynman’s own work, which is worth knowing before anyone sells it as a genius’s private routine.
Why stalling is the point
Technical vocabulary can carry an explanation a long way without any mechanism being understood — a term standing in for the thing it names is easy to mistake for knowing it. Plain language takes that cover away.
Where you stall, you have a specific hole and a specific thing to go back to the source for. It is retrieval practice with an answer check attached, in a format that does not need a classmate.
How to run it
Write the explanation, find the stalls, return to the source for those passages only, rewrite them. The loop is the method; the first draft is not the deliverable.
Saying it to an actual person is the stronger version of the same loop: you get interrupted exactly where the explanation was hand-wavy.
Common mistakes
- Writing the summary you already had instead of producing an explanation from memory. That is copying with extra steps, and it stalls nowhere.
- Stopping after a smooth draft. A smooth first draft usually means you wrote about something you already knew.
- Treating jargon as precision. If the technical term is what you would have to look up in order to explain it, it has explained nothing yet.
Things you can try today
- Take the concept you studied most this week and write it for a bright twelve-year-old. Underline every sentence you had to abandon.
- For each underlined sentence, go back to the source and rewrite that passage without the term you hid behind.
- Say the whole thing out loud to someone and let them interrupt. Note the questions you cannot answer.