Assumption Quote by Maurice Allais

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 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

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

— Richard Dawkins

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

If even in science there is no a way of judging a theory but by assessing the number, faith and vocal energy of its…

— Imre Lakatos

If we have a correct theory but merely prate about it, pigeonhole it and do not put it into practice, then that theory, however…

— Mao Zedong

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

— Dean Ornish

It is easy to obtain confirmations, or verifications, for nearly every theory-if we look for confirmations. Confirmations should count only if they are the…

— Karl Popper

Scientists can never be sure about the correctness of their theories. Every theory is just as good as the things it manages to predict…

— Sabelo Lan Mashabela

A theory has only the alternative of being right or wrong. A model has a third possibility: it may be right, but irrelevant.

— Manfred Eigen