Examples from the Web for protagoras
Well now, I said, you and I are going to Protagoras, and we are ready to pay him money on your behalf.Protagoras|Plato
He is said to owe much to Protagoras, and wrote a dialogue under that title.Concord Days|A. Bronson Alcott
Protagoras had denied the objectivity of truth, and the later Sophists had applied the same theory to morals.
Now it is practically this distinction that Protagoras denied.
We have now to remark upon the special doctrine of Protagoras πᾶν τὸ φαινόμενον ἀληθές.Aristotle|George Grote