John S. Bell Quotes

John Stewart Bell FRS was a physicist from Northern Ireland and the originator of Bell's theorem, an important theorem in quantum physics regarding hidden variable theories. Wikipedia  

✵ 28. June 1928 – 1. October 1990
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John S. Bell: 19   quotes 3   likes

Famous John S. Bell Quotes

“I am a Quantum Engineer, but on Sundays I Have Principles.”

Opening sentence of his "underground colloquium" in March 1983, as quoted by Nicolas Gisin in an edition by [J. S. Bell, Reinhold A. Bertlmann, Anton Zeilinger, Quantum [un]speakables: from Bell to quantum information, Springer, 2002, 3540427562, 199]

John S. Bell Quotes

“ORDINARY QUANTUM MECHANICS (as far as I know) IS JUST FINE FOR ALL PRACTICAL PURPOSES.”

Against 'measurement' (1990)
Context: I agree with them about that: ORDINARY QUANTUM MECHANICS (as far as I know) IS JUST FINE FOR ALL PRACTICAL PURPOSES. Even when I begin by insisting on this myself, and in capital letters, it is likely to be insisted on repeatedly in the course of the discussion. So it is convenient to have an abbreviation for the last phrase: FOR ALL PRACTICAL PURPOSES = FAPP.

“FOR ALL PRACTICAL PURPOSES = FAPP.”

Against 'measurement' (1990)
Context: I agree with them about that: ORDINARY QUANTUM MECHANICS (as far as I know) IS JUST FINE FOR ALL PRACTICAL PURPOSES. Even when I begin by insisting on this myself, and in capital letters, it is likely to be insisted on repeatedly in the course of the discussion. So it is convenient to have an abbreviation for the last phrase: FOR ALL PRACTICAL PURPOSES = FAPP.

“1 + P(b, c) ≥ |P(a, b) - P(a, c)|”

On the Einstein-Podolsky-Rosen paradox (1964)

“Bohr was inconsistent, unclear, willfully obscure and right. Einstein was consistent, clear, down-to-earth and wrong.”

quoted in Graham Farmelo, " Random Acts of Science http://www.nytimes.com/2010/06/13/books/review/Farmelo-t.html", The New York Times (June 11, 2010)

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