“One truth we have been able to count on concerning scientific persuit over the centuries has been that only testable theories survive the intense scrutiny of experimental science.”

Source: Reinventing Gravity (2008), Chapter 8, Strings And Quantum Gravity, p. 136

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John Moffat 22
British-Canadian physicist 1932

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Unsourced variant: Evolution is not a fact. Evolution doesn't even qualify as a theory or as a hypothesis. It is a metaphysical research program, and it is not really testable science.
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