It is significant that the Empirics ask why agreement should be taken to be the sign of truth and answer simply, “It is known from experience.” They give the same reason for believing in “transition to the similar,” that is, argument from analogy. “Empirical transition . . . relies on what is known naturally, not because it is plausible (suasibile, probably translating pithanon) that something similar should have similar effects, lack similar things, or be similarly affected; it is not because of this or because of anything else of this sort that one insists on transition, but only because we
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