Interest Quote by Karl Popper

There can be theory but, you know, the problem is you've got to be able to test it. So theories are one thing, testing…

— Brian Schmidt

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

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

— Jerry A. Coyne

There is nothing so practical as a good theory.

— Kurt Lewin

Any theory is better than no theory.

— Fuller Albright

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 situation in the sciences is this: A concept or an idea which cannot be measured or cannot be referred directly to experiment may…

— Richard P. Feynman

No theory of the universe can be satisfactory which does not adequately account for the phenomena of life, especially in that richest form which…

— Burnett Hillman Streeter

No experimental result can ever kill a theory: any theory can be saved from counterinstances either by some auxiliary hypothesis or by a suitable…

— Imre Lakatos

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

— Ralph Waldo Emerson

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

The theory of science which permits and encourages the exclusion of so much that is true and real and existent cannot be considered a…

— Abraham Maslow