Knowledge, belief, and recollection

Plato draws a sharp line between two states of mind. Epistēmē (knowledge) is stable, reliable, and can give an account of itself. Doxa (belief or opinion) may happen to be true, but it is unstable and cannot explain why it is true. The two even have different objects: knowledge is of the Forms (the eternal, unchanging realities), while opinion is of the shifting sensible world.

So the mark of knowledge is not merely truth, but truth plus an account (logos) that binds it. This is why, for Plato, you can be right about many things and still not know them: a lucky guess, a memorized fact, a well-sounding opinion — each can be true and yet untethered. Knowledge is the tethered kind, and its natural home is the world of Forms, where the “why” bottoms out in eternal, unchanging natures.

But now a paradox threatens the whole project of inquiry. In the Meno (80d–e) the character Meno poses it as a dilemma: either you already know what you’re looking for, or you don’t. If you already know it, you don’t need to search. If you don’t know it at all, you couldn’t even recognize it if you stumbled on it — you wouldn’t know what you were looking for. So inquiry is either unnecessary or impossible. This is Meno’s Paradox, the paradox of inquiry.

Plato’s solution is recollection (anamnēsis). The soul is immortal and, before its embodiment, was directly acquainted with the Forms. Birth into a body makes us forget, but the knowledge is latent within us. So-called “learning” is really re-collecting — drawing back up what the soul already possesses. This slips between the horns of the paradox: we are neither in total knowledge (we’ve forgotten) nor total ignorance (the knowledge is buried within, recoverable).

The Phaedo (72e–76e) gives recollection its most rigorous form. We judge sensible sticks and stones to be “equal” — yet also to fall short of true Equality, to be “deficiently equal.” To register something as deficient, you must already possess the standard it falls short of: Equality itself. But the senses never handed us a perfect equal. So we must have grasped Equality itself before we ever used our senses — that is, before birth. Our soul knew the Forms and now recollects them, prompted by their imperfect sensible reminders.

Two large consequences follow. First, innate knowledge: the deepest things we know were not written on a blank slate by experience but were already in the soul, awaiting recovery. Second, the soul’s pre-existence: if the soul knew the Forms before birth, it existed before the body — the first step toward Plato’s case for the soul’s immortality, which the Phaedo develops next.