Kitap 5
10
AMONG fallacious arguments the one which the Greeks call a)ntistre/fon seems to be by far the most fallacious. Such arguments some of our own philosophers have rather appropriately termed reciproca, or convertible. The fallacy arises from the fact that the argument that is presented may be turned in the opposite direction and used against the one who has offered it, and is equally strong for both sides of the question. An example is the well-known argument which Protagoras, the keenest of all sophists, is said to have used against his pupil Euathlus.
