Mention should also be made of Plato’s method of hypothesis. The method is actually quite simple and sensible. The idea, if one is having a dispute with someone, is to find a hypothesis that you both agree upon, and see what follows from it. For instance, Socrates and Simmias disagree about whether or not the soul is an attunement, but they agree about the Theory of Forms. The Theory of Forms implies the Theory of Recollection, which is in conflict with Simmias’ argument of attunement. If the hypothesis itself comes into question, the two disputants need merely retreat a little to a new, simpler hypothesis upon which they can both agree. Here, the Theory of Forms is the common ground that everyone shares, and so it can serve as the starting point for a proof of the immortality of the soul.