Reciprocal intercommunion of all Forms--inadmissible _ib._ Some Forms admit of intercommunion, others not. This is the only admissible doctrine. Analogy of letters and syllables _ib._ Art and skill are required to distinguish what Forms admit of intercommunion, and what Forms do not. This is the special intelligence of the Philosopher, who lives in the bright region of Ens: the Sophist lives in the darkness of Non-Ens 208 He comes to enquire what Non-Ens is. He takes for examination five principal Forms--Motion--Rest--Ens--Same--Different _ib._ Form of Diversum pervades all the others 209 Motion is different from Diversum, or is not Diversum. Motion is different from Ens--in other words, it is Non-Ens. Each of these Forms is both Ens and Non-Ens 210 By Non-Ens, we do not mean anything contrary to Ens--we mean only something different from Ens. Non-Ens is a real Form, as well as Ens _ib._ The Eleate claims to have refuted Parmenides, and to have shown both that Non-Ens is a real Form, and also what it is 211 The theory now stated is the only one, yet given, which justifies predication as a legitimate process, with a predicate different from the subject 212 Enquiry, whether the Form of Non-Ens can come into intercommunion with the Forms of Proposition, Opinion, Judgment 213 Analysis of a Proposition. Every Proposition must have a noun and a verb--it must be proposition of _Something_. False propositions, involve the Form of Non-Ens, in relation to the particular subject _ib._ Opinion, Judgment, Fancy, &c., are akin to Proposition, and may be also false, by coming into partnership with the Form Non-Ens 214 It thus appears that Falsehood, imitating Truth, is theoretically possible, and that there may be a profession, like that of the Sophist, engaged in producing it _ib._ Logical distribution of Imitators--those who imitate what they know, or what they do not know--of these last, some sincerely believe themselves to know, others are conscious that they do not know, and designedly impose upon others 215 Last class divided--Those who impose on numerous auditors by long discourse, the Rhetor--Those who impose on select auditors, by short question and answer, making the respondent contradict himself--the Sophist 215 Dialogue closed. Remarks upon it. Characteristics ascribed to a Sophist 216 These characteristics may have belonged to other persons, but they belonged in an especial manner to Sokrates himself _ib._ The conditions enumerated in the dialogue (except the taking of a fee) fit Sokrates better than any other known person 217 The art which Plato calls "the thoroughbred and noble Sophistical Art" belongs to Sokrates and to no one else. The Elenchus was peculiar to him. Protagoras and Prodikus were not Sophists in this sense 218 Universal knowledge--was professed at that time by all Philosophers--Plato, Aristotle, &c. 219