We have still to determine, however (continues Plato), what this Non-Ens or Non-Reality is. For this purpose we will take a survey, not of all Forms or Genera, but of some few the most important. We will begin with the two before noticed--Motion and Rest ( = Change and Permanence), which are confessedly irreconcileable and reciprocally exclusive. Ens however enters into partnership with both: for both of them _are_, or exist.[61] This makes up three Forms or Genera--Motion, Rest, Ens: each of the three being the same with itself, and different from the other two. Here we have pronounced two new words--Same--Different.[62] Do these words designate two other Forms, over and above the three before-named, yet necessarily always intermingling in partnership with those three, so as to make five Forms in all? Or are these two--Same and Different--essential appendages of the three before-named? This last question must be answered in the negative. Same and Different are not essential appendages, or attached as parts, to Motion, Rest, Ens. Same and Different may be predicated both of Motion and of Rest: and whatever can be predicated alike of two contraries, cannot be an essential portion or appendage of either. Neither Motion nor Rest therefore _are_ essentially either Same or Different: though both of them partake of Same or Different--_i.e._, come into accidental co-partnership with one as well as the other.[63] Neither can we say that Ens is identical with either Idem or Diversum. Not with Idem--for we speak of both Motion and Rest as Entia or Existences: but we cannot speak of them as the same. Not with Diversum--for _different_ is a name relative to something else from which it is different, but Ens is not thus relative. Motion and Rest _are_ or exist, each in itself: but each is _different_, relatively to the other, and to other things generally. Accordingly we have here five Forms or Genera--Ens, Motion, Rest, Idem, Diversum: each distinct from and independent of all the rest.[64] [Footnote 61: Plato, Sophist. p. 254 D. [Greek: to\ de/ ge o)\n mikto\n a)mphoi=n; _e)sto\n_ ga\r a)/mphô pou.]] [Footnote 62: Plato, Sophist. p. 254 E. [Greek: ti/ pot' au)= nu=n ou(/tôs ei)rê/kamen to/ te tau)to\n kai\ tha/teron? po/tera du/o ge/nê tine\ au)tô/, tô=n me\n triô=n a)/llô], &c.] [Footnote 63: Plato, Sophist. p. 255 B. [Greek: mete/cheton mê\n a)/mphô tau)tou= kai\ thate/rou . . . Mê\ toi/nun le/gômen ki/nêsi/n _g' ei)=nai_ tau)to\n ê)\ tha/teron, mêd' au)= sta/sin.]] [Footnote 64: Plato, Sophist. p. 255 D.] [Side-note: Form of Diversum pervades all the others.]