Idea Ripper // ArchiveCards: 1555 [Live] | Updated: 2026-10-14
Card #c1222IR // #c1222Synthesis

"Physicist and Nobel Prize winner Richard Feynman once said that he could only determine whether he understood something if he could give an introductory lecture on it."

— In our words · Source: How to Take Smart Notes (Sönke Ahrens)

[Use when]

You think you understand a subject well enough to explain it, sell it or decide on it.

[Why it matters]

Ahrens calls reading with a pen in hand the small-scale version of that lecture. A note written for someone who lacks your context exposes the gaps that rereading hides.

Filed under situations:When your picture of things might be wrongWhen you need a yes and they’re not there yet

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