Apples Quote by Bill Nye

The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species…

— David Deutsch

A theory not only explains the world we see, it lets us imagine other worlds, and, even more significantly, lets us act to create…

— Alison Gopnik

[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

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

Evolution is an organizing principle and when we call it a theory, we mean it's a theory, we don't mean that it's a belief…

— Alan I. Leshner

First, Darwinian theory tells us how a certain amount of diversity in life forms can develop once we have various types of complex living…

— Phillip E. Johnson

The theory of evolution, like the theory of gravity, is a scientific fact.

— Neil deGrasse Tyson

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

A rational prediction has an explanation based on theory.

— W. Edwards Deming

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

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

It is the theory which decides what we can observe

— Albert Einstein