"Any physical theory is always provisional, in the sense that it is only a hypothesis: you can never prove it."
Theory quotes
Theory
540 quotes on this topic — from poets, philosophers, and thinkers across history.
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Theory quotes (page 2 of 27)
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"It is the theory which decides what we can observe"
"Theory is knowledge that doesn't work. Practice is when everything works and you don't know why."
"Another thing I must point out is that you cannot prove a vague theory wrong."
"A work in which there are theories is like an object which still has the ticket that shows its price."
"It is the theory that decides what can be observed."
"I have a theory... that someplace at the heart of most compelling stories is something that doesn't make sense."
"The supreme misfortune is when theory outstrips performance"
"The theory must not contradict empirical facts."
"It's perfectly obvious that there is some genetic factor that distinguishes humans from other animals and that it is language-specific. The theory of that genetic component, whatever it turns out to be, is what is called universal grammar."
"The secret of theory is that truth does not exist."
"As far as social-economic theory is concerned, I am still a Marxist"
"The content of scientific theory itself offers no moral foundation for the personal conduct of life."
"Frankly, these days, without a theory to go with it, I can't see a painting."
"While in theory randomness is an intrinsic property, in practice, randomness is incomplete information."
"Socrates thought and so do I that the wisest theory about the gods is no theory at all."
"The theory of the free press is not that the truth will be presented completely or perfectly in any one instance, but that the truth will emerge from free discussion"
"Genetic theories, I gather, have been cherished academically with detachment."
"He that travels in theory has no inconveniences."
"History, contrary to popular theories, is kings and dates and battles."