Accepted Quote by Robert Shapiro

A theory is scientific only if it can be disproved. But the moment you try to cover absolutely everything the chances are that you…

— Hermann Bondi

No particular theory may ever be regarded as absolutely certain.... No scientific theory is sacrosanct...

— Karl Popper

Every theory presented as a scientific concept is just that; it's a theory that tries to explain more about the world than previous theories…

— Marvin Harris

“[Modern scientific] theories can necessarily never be more than hypothetical, since their starting-point is wholly empirical, for facts in themselves are always susceptible of…

— René Guénon

Historically speaking all - or very nearly all - scientific theories originate from myths.

— Karl Popper

If you can't think of an observation that could disprove a theory, that theory simply isn't scientific.

— Jerry A. Coyne

[Theory is] an explanation that has been confirmed to such a degree, by observation and experiment, that knowledgeable experts accept it as fact. That's…

— David Quammen

A theory accepted by 99 percent of scientists may be wrong.

— Tom Bethell

There never comes a point where a theory can be said to be true. The most that one can claim for any theory is…

— A.J. Ayer

One does not ask whether a scientific theory is true, but only whether it is convenient.

— Henri Poincare

But some of these theories are so bold that they can clash with reality: they are the testable theories of science. And when they…

— Karl Popper

Theories are not rejected by cirsumstantial evidence: it takes a theory to beat a theory.

— George Stigler