Gorgias

Gorgias, a Greek philosopher, one of the early "Sophists" or teachers of rhetoric, was born at Leontini in Sicily early in the 5th century B.C., and died at Larissa in Thessaly about 375 B.C. Little is known of him save that Plato associated his name with one of the most finished of his dialogues, and that he was the author of a work On the Non-existent, or Nature.