Clash Quote by Karl Popper

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

[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

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 in any branch of science entails a risk of detachment from reality”

— Quammen, David

A theory must be tempered with reality.

— Jawaharlal Nehru

I'm not sure what theory is, unless it's the pursuit of fundamental questions.

— David Antin

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

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

[we see that] science is eminently perfectible, and that each theory has constantly to give way to a fresh one.

— Jules Verne

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

Our minds are specifically adapted to developing certain theories, and we have a science if the theories that are available to our minds happen…

— Noam Chomsky

...theories should be judged by their ability to predict events rather than by the realism of their assumptions.

— Milton Friedman