Being true Quote by A.J. Ayer

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

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

“[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

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

— Ralph Waldo Emerson

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

The truth of a theory can never be proven, for one never knows if future experience will contradict its conclusions.

— Albert Einstein

[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

Everybody has a theory.

— Daniel Handler

When one theory is simpler than its competitor, this fact is relevant to saying what the world is like.

— Elliott Sober

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

— Paul Feyerabend

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

Any theory is better than no theory.

— Fuller Albright