Certain Quote by Karl Popper

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

“[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

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

— Henri Poincare

We have reached a situation where a theory has been accepted as fact by some, and possible contrary evidence is shunted aside. [This is]…

— Robert Shapiro

I'm not sure what theory is, unless it's the pursuit of fundamental questions.

— David Antin

Any theory is better than no theory.

— Fuller Albright

If we have a correct theory but merely prate about it, pigeonhole it and do not put it into practice, then that theory, however…

— Mao Zedong

No single theory ever agrees with all the facts in its domain

— Paul Feyerabend

A good scientific theory is one which is falsifiable, which has not been falsified.

— Richard Dawkins

“No scientific theory can claim absolutely certainty.”

— David Christian

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

— Tom Bethell

A theory which is not refutable by any conceivable event is non-scientific. Irrefutability is not a virtue of a theory (as people often think)…

— Karl Popper