Simplikius noted it as one among the differences between Plato and Aristotle--That Plato admitted Unum as having only one meaning, not being aware of the diversity of meanings which it bore; while Aristotle expressly pointed it out as a [Greek: pollakô=s lego/menon] (Schol. ad Aristot. Sophist. Elench. p. 320, b. 3, Brandis). Aristotle farther remarks that Plato considered [Greek: to\ ge/nos] as [Greek: e(\n a)rithmô=|], and that this was an error; we ought rather to say that Plato did not clearly discriminate [Greek: e(\n a)rithmô=|] from [Greek: e(\n ei)/dei] (Aristot. Topic. vi. 143, b. 30). Simplikius farther remarks, that it was Aristotle who first rendered to Logic the important service of bringing out clearly and emphatically the idea of [Greek: to\ o(mô/numon]--the same word with several meanings either totally distinct and disparate, or ramifying in different directions from the same root, so that there came to be little or no affinity between many of them. It was Aristotle who first classified and named these distinctions ([Greek: sunô/numon--o(mô/numon], and the intermediate [Greek: kat' a)nalogi/an]), though they had been partially noticed by Plato and even by Sokrates. [Greek: e(/ôs A)ristote/lous ou) pa/mpan e)/kdêlon ê)=n to\ o(mô/numon; a)lla\ Pla/tôn te ê)/rxato peri\ tou/tou ê)\ ma=llon e)kei/nou Sôkra/tês], Schol. ad Aristot. Physic. p. 323, b. 24, Brandis.] [Side-note: In the Platonic Demonstrations the same proposition in words is made to bear very different meanings.]