Euthydemus

"Euthydemus is Plato's defense of Socratic dialogue as a means to pursue truth.
In Euthydemus, Plato has Socrates engage in a conversation with the title character and his brother Dionysodorus, both famous Sophists. They are representative of a type of argument, which Plato calls 'eristic', that emphasizes verbal trickery in order to humiliate your opponent and win your debate. This is contrasted with Socrates' dialectic, where words are a means of discerning reality, not gaining victory. In the process, Plato makes a case for the Socratic method as a means of educating youth, something he was attempting to do in his own newly-opened Academy.
Presented in Plato's usual dramatic style, Euthydemus is simultaneously an engaging read and a passionate pedagogical manifesto.