Adjective
Protagorean
Of or relating to the Greek philosopher Protagoras and his thought.
It serves as a supporting theory to the Protagorean interpretation of Theaetetus's claim, in order that they might fully inquire as to the validity of this premise. Source: Internet
The lowest level, which represents "the world of becoming and passing away" (Republic, 508d), is the metaphysical model for a Heraclitean philosophy of constant flux and for Protagorean philosophy of appearance and opinion. Source: Internet
It is important to note that the Heraclitean doctrine of Flux is not the same as the Protagorean doctrine. Source: Internet