Chance Quote by Hermann Bondi

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

— Jerry A. Coyne

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

— Karl Popper

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

[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

A theory is something nobody believes, except the person who made it. An experiment is something everybody believes, except the person who made it.

— Albert Einstein

Theories, for me, are just about freeing your mind. It doesn't mean the theory is going to work like a scientific theory works. It's…

— Steve Martin

“[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

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

— Richard Dawkins

Theory is good; but it doesn't prevent things from existing.

— Jean-Martin Charcot

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

To construct a scientific theory from the data and to be able to recognize that it is a reasonable theory is possible only if…

— Noam Chomsky