  Oneness and Uniqueness are different principles: to say that a form is one is to say not that it is unique, but rather that it is something that can be counted. For Plato infers the oneness of the beautiful from the fact that the beautiful and the ugly are two, the oneness of the large from the fact that the large and the small are two, and so on (Republic 475e9–476a6, 524b3–9). Thus the sense in which each form is one is similar to the sense in which Socrates is one, in being one among many (Parmenides 129c8–d2).