Abstract

First Criticism of the Theory.—This is of the nature of an argumentum ad hominem. In the first place, It is surprising that so clever a man as Protagoras did not see that he proved more than he intended, for according to his theory not only are all men, the wise and the foolish, reduced to the same level, but on the plane of sentient experience it is just as true to say that a pig or a tadpole is the measure of all things.