Although the so-called "pragmatic" test of truth--the idea that the truth of a statement is a function of its predictive value--is usually credited to william james, we possess a version of this truth-test from the third-century b c in the philosophy of carneades of cyrene, the head of the skeptical "middle academy". like james, carneades denied the existence of absolute truth, in the sense of a truth which no further experience could change, offering instead a criterion of probability, the highest (...) form of which is "the probable and tested". (shrink)