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"A theory can be proved by experiment; but no path leads from experiment to the birth of a theory."
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"If a philosophic theory is once ruled out of court, no one can tell when it will appear again."

"I have this theory- that if we're told we're bad, then that's the only ideal we'll ever have."

"On the other hand, we don't understand the theory too completely, and because of this fuzziness of spacetime, the very concept of spacetime and spacetime dimensions isn't precisely defined."

"It doesn't matter how beautiful your theory is, it doesn't matter how smart you are. If it doesn't agree with experiment, it's wrong."

"Things are still in early stages, but one can imagine that as we build up and systematize our theories of these associations, and try to boil them down to their core, the result might point us toward the sort of fundamental principles I advocate."

"A unified theory would put us at the doorstep of a vast universe of things that we could finally explore with precision."

"On the basis of Lorentz's theory, if we limit ourselves to a single spectral line, it suffices to assume that each atom (or molecule) contains a single moving electron."

"The theory of founder effects does not explain how novel features like plumage traits arise."
Explore more quotes by Manfred Eigen

"A theory has only the alternative of being right or wrong. A model has a third possibility: it may be right, but irrelevant."

"A theory can be proved by experiment; but no path leads from experiment to the birth of a theory."

"In theory, there is no difference between theory and practice. But, in practice, there is."
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