Ability Quote by Milton Friedman

A theory must be tempered with reality.

— Jawaharlal Nehru

Theories can be based on any assumptions, however bizarre.

— Milton Friedman

And theories are no more than fictions which help us to make sense of experience and which are subject to disconfirmation when their explanations…

— Chinua Achebe

All theories are legitimate, no matter. What matters is what you do with them.

— Jorge Luis Borges

But some of these theories are so bold that they can clash with reality: they are the testable theories of science. And when they…

— Karl Popper

A theory's assumptions always are and ought to be unrealistic. Further, we should attempt to make them more unrealistic in order to increase a…

— Satoshi Kanazawa

Theories are usually the over-hasty efforts of an impatient understanding that would gladly be rid of phenomena, and so puts in their place pictures,…

— Johann Wolfgang von Goethe

Theories are just fantasies. And they change.

— Michael Crichton

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

Theories then are dangerous things.

— Virginia Woolf

If there is something very slightly wrong in our definition of the theories, then the full mathematical rigor may convert these errors into ridiculous…

— Richard P. Feynman