Notice also how the series of objections seems to be carefully structured: Parmenides starts by asking what sorts of Forms exist, and then moves on to progressively more crucial issues. The first and second objections focus on how a Form can be one, the third on its real, separate existence outside our minds, the fourth and fifth on the question of how the Forms relate to their participants. So the objections form an implicit road-map, laying out the requirements for a successful theory of Forms: each Form must be one and immaterial, it must be independent of our minds, it must be enough
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