You cannot run a business, or anything else, on a theory.

You cannot run a business, or anything else, on a theory.

I never once made a discovery ... I speak without exaggeration that I have constructed three thousand different theories in read more

I never once made a discovery ... I speak without exaggeration that I have constructed three thousand different theories in connection with the electric light ... Yet in only two cases did my experiments prove the truth of my theory.

You have to know you can first. How comes later.

You have to know you can first. How comes later.

A young boy is a theory, an old man is a fact.

A young boy is a theory, an old man is a fact.

A theory has only the alternative of being right or wrong. A model has a third possibility - it may read more

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

Science is organized common sense where many a beautiful theory was killed by an ugly fact.

Science is organized common sense where many a beautiful theory was killed by an ugly fact.

How empty is theory in the presence of fact

How empty is theory in the presence of fact

[Do not] put too much confidence in experimental results until they have been confirmed by theory.

[Do not] put too much confidence in experimental results until they have been confirmed by theory.

Life is so unlike theory.

Life is so unlike theory.