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There is one science, [Roger Bacon] says, more perfect than others, which is needed to verify the others, the science of experiment, surpassing the sciences dependent on argument, since these sciences do not bring certainty, however strong the reasoning, unless experiment be added to test their conclusions. Experimental science alone is able to ascertain what can be effected by nature, what by art, what by fraud. It alone teaches how to judge all the follies of the magicians, just as logic can be used to test argument.—B. L. Gordon, Medieval and Renaissance Medicine, New York, Philosophical Library, 1959, page 271.
THE SCIENCE OF EXPERIMENT. JAMA. 1960;174(14):1857. doi:10.1001/jama.1960.03030140079023