Theories are only verified hypotheses, verified by more or less numerous facts. Those verified by the most facts are the best, but even then they are never final, never to be absolutely believed.
Claude Bernard
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In the course of a life devoted less to living than to reading, I have verified many times that literary intentions and theories are nothing more than stimuli and that the final work usually ignores or even contradicts them.
Jorge Luis Borges
The end is low, like all quantitative ends, personal or not, and it can be attained and verified.
Fernando Pessoa
Four predictions of the Big Bang Theory have now been verified - surely enough to quench even the most biased critics.
Joseph Silk
Although it is admitted that certain differences cannot be verified by experiment, we should not infer from this fact that they do not exist. ...we are accused of having confused subjective inability with objective indeterminacy.
Hans Reichenbach
The strongest arguments prove nothing so long as the conclusions are not verified by experience. Experimental science is the queen of sciences and the goal of all speculation.
Roger Bacon
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