But after this he has no more to say; the answers which he makes are only elicited from him by the dialectic of Socrates.
He has not yet experienced the influence of the Sophists like Glaucon and Adeimantus, nor is he sensible of the necessity of refuting them; he belongs to the pre-Socratic or pre-dialectical age.

He is incapable of arguing, and is bewildered by Socrates to such a degree that he does not know what he is saying.

He is made to admit that justice is a thief, and that the virtues follow the analogy of the arts.

From his brother Lysias (contra Eratosth.) we learn that he fell a victim to the Thirty Tyrants, but no allusion is here made to his fate, nor to the circumstance that Cephalus and his family were of Syracusan origin, and had migrated from Thurii to Athens.
The 'Chalcedonian giant,' Thrasymachus, of whom we have already heard in the Phaedrus, is the personification of the Sophists, according to Plato's conception of them, in some of their worst characteristics.

He is vain and blustering, refusing to discourse unless he is paid, fond of making an oration, and hoping thereby to escape the inevitable Socrates; but a mere child in argument, and unable to foresee that the next 'move' (to use a Platonic expression) will 'shut him up.' He has reached the stage of framing general notions, and in this respect is in advance of Cephalus and Polemarchus.