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A young boy is a theory, an old man is a fact.
A young boy is a theory, an old man is a fact.
Relativity applies to physics, not ethics
Relativity applies to physics, not ethics
He who loves practice without theory is like the sailor who boards ship without a rudder and compass and never read more
He who loves practice without theory is like the sailor who boards ship without a rudder and compass and never knows where he may cast.
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.
There can be no theory of any account unless it corroborate with the theory of the earth.
There can be no theory of any account unless it corroborate with the theory of the earth.
If the facts don't fit the theory, change the facts.
If the facts don't fit the theory, change the facts.
It is the theory that decides what can be observed
It is the theory that decides what can be observed
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.
