This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.
Beyond his own poem, Parmenides survives in the philosophical tradition as a character in someone else's work: Plato wrote a dialogue named simply Parmenides, staging an aged Parmenides, accompanied by his student Zeno of Elea, in conversation with a young Socrates in Athens. In Plato's telling, Parmenides subjects Socrates's early theory that abstract Forms exist separately from the particular things that share in them to a demanding series of objections, difficulties later philosophy has continued to call the problem of participation, before the dialogue moves into an intricate exercise in dialectical argument about the nature of unity itself.
Whether the meeting Plato depicts, and even Parmenides's visit to Athens, ever actually happened is a question ancient and modern scholars alike cannot settle from independent evidence, since Plato's dialogues regularly place historical figures in scenes built for philosophical purposes rather than historical record, and no other surviving source confirms the encounter. Parmenides's own biography beyond his likely birth date around 515 BCE in Elea is similarly thin: no death date for him survives in any ancient record at all, leaving the end of his life, unlike its beginning, entirely undated.
That the fullest surviving portrait of Parmenides in conversation was composed by Plato, a philosopher writing a century after Parmenides's own likely lifetime, for reasons of his own philosophical argument, says as much about how classical philosophy transmits its founding figures as it does about Parmenides himself.