Greek philosophers
Lycophron
Lycophron was a Greek philosopher who is classified as a sophist. He lived in the first half of the 4th century BC.
The teacher of Lycophron was supposed to be Gorgias of Leontini (according to Aristotle's references in the Rhetoric). Another mention of him was written by Plato in his second letter to the tyrant in Syracuse, Dionysius II, where he mentions that Lycophron had stayed at his court.
According to Aristotle, Lycophron went so far in his skepticism that he refused to use the verb "to be" in making pronouncements. For example, he did not say that man "is white," but that he "has become white," lest perhaps the addition of the word "is" should make one many. Further, he did not acknowledge nobility, saying that it was a mere word. He referred to science as the union of knowledge and soul. He regarded laws as guarantors of mutual rights.