I show that Socrates' mature philosophy must be read as a reaction to and fulfillment of Parmenidean monism. I take my departure from Parmenides' assertion in the dialogue that participation must be a true account, as he says, for otherwise dialogue would be rendered impossible. I claim that the Socratic account can only achieve its proper truth once it appreciates the grounding Eleatic insight that the effort to name Being is riddled with aporias, which Socrates learns on his own terms (...) through the dialectical "training" in unity demonstrated in the dialogue. I show that Socrates here gains the resources to see ideas as hypotheses, securing the knowledge of his own ignorance as a science of sorts by which he learns to abide by the limits, failures, and breakdowns of human understanding within a rigorously "scientific" context. The Parmenides is thus to be located at the stage of philosophical education where mathematical training gives way to dialectics, and subsequently prepares the philosopher's return to the "cave" as described in the Republic. Practice in the dialectically inspired art of epistemological collapse later gives Socrates the power to help his interlocutors confront the limits of their own knowledge and become open to freedom through the work of self-examination. (shrink)