Able Quote by Noam Chomsky

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

But actually theory is very practical. Gravity is a theory, for example. It allows you to predict that if you step off a cliff…

— Clayton Christensen

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

— Jerry A. Coyne

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

A theory may be so rich in descriptive possibilities that it can be made to fit any data.

— Phillip Johnson-Laird

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

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

“[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

Science is based on the possibility of objectivity, on the possibility of different people checking out for themselves the observations made by others. Without…

— Jose Padilha

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

— Dean Ornish

A theory is a good theory if it satisfies two requirements: it must accurately describe a large class of observations on the basis of…

— Stephen Hawking

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

— Henri Poincare