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Many things difficult to design prove easy to performance.
Many things difficult to design prove easy to performance.
How empty is theory in the presence of fact
How empty is theory in the presence of fact
It is the theory that decides what can be observed
It is the theory that decides what can be observed
An ounce of action is worth a ton of theory.
An ounce of action is worth a ton of theory.
You cannot run a business, or anything else, on a theory.
You cannot run a business, or anything else, on a theory.
A theory is no more like a fact than a photograph is like a person.
A theory is no more like a fact than a photograph is like a person.
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.
If the facts don't fit the theory, change the facts.
If the facts don't fit the theory, change the facts.
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.
