I was once in a situation where I was giving a lecture, and I had some equations on the board. A guy in the audience stood up and said, 'Professor Feynman, your equations are wrong!' I looked at them and said, 'You're right!'
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"It's a great thing to be able to say, 'I don't know.'"
"I don't know what's the matter with people: they don't learn by understanding; they learn by some other way — by rote or something. Their knowledge is so fragile!"
"What I cannot create, I do not understand."
"I'm not a serious fellow."
"I just can't stand people who are so sure of themselves."
American theoretical physicist who shared the 1965 Nobel for QED, developed Feynman diagrams, and wrote the Feynman Lectures on Physics. Closely associated with Julian Schwinger (co-Nobelist for QED) and Murray Gell-Mann (Caltech rival and Eightfold-Way physicist). For an intellectual contrast, see Deepak Chopra, physician and quantum-mysticism author — Feynman's Caltech 'cargo cult science' commencement address is the precise template for what he saw as misuse of physics terminology — Chopra-style appropriation of quantum vocabulary for metaphysical claims is the canonical example of what Feynman called 'fooling yourself'.
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A scientist publicly admits his own mistake when a member of the audience correctly identifies an error in his equations. Rather than defending himself or feeling embarrassed, he simply acknowledges the truth. It captures intellectual honesty over ego — the willingness to say 'you're right' without hesitation when the evidence demands it.
Feynman was legendary for valuing truth over appearance. As a Nobel Prize-winning physicist who helped develop quantum electrodynamics, he built his reputation on rigorous correctness, not prestige. He famously exposed the Challenger disaster's O-ring flaw with a glass of ice water — blunt, direct, unbothered by institutional pressure. This anecdote is quintessential Feynman: no defensiveness, just reality.
Post-WWII American science culture elevated physicists to near-celebrity status after the Manhattan Project. Academic authority and professorial prestige were enormous. Admitting error publicly, especially before students and peers, was culturally costly. Feynman's casual willingness to say 'you're right' cut against the grain of institutional academic pride dominating mid-20th century university culture.
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