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 (prō-tăg′ər-əs) fl. fifth century bc.
Greek philosopher. Considered the first Sophist, he taught a philosophy based on his maxim "Man is the measure of all things."

Pro·tag′o·re′an (-ə-rē′ən) adj.


(Biography) ?485–?411 bc, Greek philosopher and sophist, famous for his dictum "Man is the measure of all things."


(proʊˈtæg ər əs)

c480–c421 B.C., Greek Sophist philosopher.
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References in periodicals archive ?
Protagoras of Abdera: "For every argument there is an equal and weighty counterargument." The business of communication is the promotion of a plurality of counterarguments, in the spirit of dissoi logoi.
Postmodern anti-foundationalism is little more than a disinterment and illegitimate extension of some eighteenth, century reformulations by Berkeley and Hume of the famous anthropometric admonition by Protagoras of Abdera: "Man is the measure of all things, of things that are that they are, and of things that are not that they are not"
Early Sophists such as Gorgias and Protagoras of Abdera were conservative: they affirmed things as they were and stood for the rule of law and order.