Two arguments against relativism in Plato’s "Theaetetus"

In this article, I analyze two arguments against relativism in Plato’s «Theaetetus». Which argument is stronger from a logical point of view? Having used some results of contemporary research on the logic of paradoxes, I give my version of the answer to that question. The results of my analysis may be used in investigating the history of ancient philosophy as well as in contemporary epistemology.