[Footnote 73: Compare Analyt. Post. I. i. p. 71, a. 25; also Metaphys. A. p. 981, a. 12.] [Footnote 74: Analyt. Post. I. xxiv. p. 85, b. 4-p. 86, a. 21. Schol. p. 233, b. 6: [Greek: o(moi/ôs de\ o)/ntôn gnôri/môn, ê( di' e)latto/nôn me/sôn ai(retôte/ra; ma=llon ga\r e)ggute/rô tê=s tou= nou= e)nergei/as.]] Such are the several reasons enumerated by Aristotle in refutation of the previous opinion stated in favour of the Particular. Evidently he does not account them all of equal value: he intimates that some are purely dialectical ([Greek: logika/]); and he insists most upon the two following:--1. He that knows the Universal knows in a certain sense the Particular; if he knows that every triangle has its three angles equal to two right angles, he knows potentially that the isosceles has its three angles equal to the same, though he may not know as yet that the isosceles _is_ a triangle. But he that knows the Particular does not in any way know the Universal, either actually or potentially.[75] 2. The Universal is apprehended by Intellect or Noûs, the highest of all cognitive powers; the Particular terminates in sensation. Here, I presume, he means, that, in demonstration of the Particular, the conclusion teaches you nothing more than you might have learnt from a direct observation of sense; whereas in that of the Universal the conclusion teaches you more than you could have learnt from direct sensation, and comes into correlation with the highest form of our intellectual nature.[76] [Footnote 75: Analyt. Post. I. xxiv. p. 86**, a. 22: [Greek: a)lla\ tô=n me\n ei)rême/nôn e)/nia logika/ e)sti; _ma/lista_ de\ dê=lon o(/ti ê( katho/lou kuriôte/ra, o(/ti--o( de\ tau/tên e)/chôn tê\n pro/tasin] (the Particular) [Greek: _to\ katho/lou ou)damô=s oi)=den, ou)/te duna/mei ou)/t' e)nergei/a|_.]] [Footnote 76: Ibid. a. 29: [Greek: kai\ ê( me\n katho/lou noêtê/, ê( de\ kata\ me/ros ei)s ai)/sthêsin teleuta=|.] Compare xxiii. p. 84, b. 39, where we noticed the doctrine that [Greek: Nou=s] is the _unit_ of scientific demonstration.]