Critics, he says, jump at certain groundless conclusions; they pass adverse judgement and then proceed to reason on it; and, assuming that the poet has said whatever they happen to think, find fault if a thing is inconsistent with their own fancy.
"[4] A later doxographical tradition, recorded by Diogenes Laertius, attributed nine dialogues to Glaucon: Phidylus, Euripides, Amyntichus, Euthias, Lysithides, Aristophanes, Cephalus, Anaxiphemus, and Menexenus,[5] however, no trace of these works remains.
Due to constant warfare between Athens and Megara, the battle in question may also be a more minor skirmish with an unknown date.
As Plato himself points out, Glaucon is a very courageous and bold interlocutor[1]: 357a2 who does not hesitate to express his doubts about Socrates' refutation of Thrasymachus.
According to some interpretations, Glaucon chooses to support Thrasymachus's thesis only to spur Socrates to defend justice in a satisfactory way.