he that hath got the idea of a triangle, and found the ways to measure its angles and their magnitudes, is certain that its three angles are equal to two right ones; and can as little doubt of that, as of this truth, that, It is impossible for the same thing to be, and not to be.
era berean, triangeluaren ideia bereganatu duena eta haren angeluak eta magnitudeak neurtzeko tresna aurkitu, ziur egonen da haren hiru angeluak bi angelu zuzenen baliokide direla, eta ez du horretaz "gauza bera izatea eta ez izatea ezinezko dela" dioen egiaz baino zalantza handiagorik ukanen.