Confirmation Quote by Karl Popper

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

Every genuine test of a theory is an attempt to falsify it, or to refute it.

— Karl Popper

A theory is only as good as its assumptions. If the premises are false, the theory has no real scientific value. The only scientific…

— Maurice Allais

“The discovery of instances which confirm a theory means very little if we have not tried, and failed, to discover refutations. For if we…

— Karl Popper

Whenever a true theory appears, it will be its own evidence. Its test is, that it will explain all phenomena.

— Ralph Waldo Emerson

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

The test of a theory is its ability to cope with all the relevant phenomena, not its a priori 'reasonableness'. The latter would have…

— John Polkinghorne

In the end, a theory is accepted not because it is confirmed by conventional empirical tests, but because researchers persuade one another that the…

— Fischer Black

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

— Richard Dawkins

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

— Karl Popper

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

— George Stigler

A valid scientific theory is predictive, verifiable, and replicable. To me, that's beautiful.

— Dean Ornish