Of Abdera, the first sophist, 5th cent. BC
P. of Abdera. The first sophist, 5th cent. BC, originator of the homo-mensura doctrine, known only from Plato's dialogue of the same name and from Diogenes Laertius.
P.' date of birth and death are obscure. In Plato's dialogue Protagoras (Pl. Prt. 317c = 80 A 5 DK) - named after him - he says that he could be the father of…