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In Physics, in order to test a theory, you must be able to extract a number from it.
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It does not matter how, if it is exact, or numerical, or a message from God: a number has to come out of the formulas in the end, and you have to compare it with the experimental data.
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Many theoretical physicists seem to forget this in their lectures, see also: Section "How to teach and learn physics".
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Ancestors

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