Roger Bacon — "Theories are of no use if they cannot be tested by experiment."
Theories are of no use if they cannot be tested by experiment.
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More from Roger Bacon
"It is necessary to know the causes of things, and not only their effects, if we wish to have perfect knowledge."
"Theology itself, which is the queen of the sciences, cannot be perfect without philosophy."
"The study of music, as it is commonly taught, is of little utility."
"Without experiment, nothing can be sufficiently known."
"There are many fables and falsehoods in the books of the Latins, which are taken for truths."
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