Roger Bacon — "Theories are of no use unless they can be verified by experiment."
Theories are of no use unless they can be verified by experiment.
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More from Roger Bacon
"Many things are held to be true which are false, and many things are held to be false which are true."
"It is a great error to despise the wisdom of the infidels."
"The study of perspective is a most noble science, and of great utility for all other sciences."
"The study of languages is therefore necessary for all sciences, and especially for theology."
"The Latins have corrupted the texts of the Scriptures, and of the philosophers."