Before revision: As formulated by Aristotle, the essence of every thing humans can know exists as an unconditional abstract kind or species: (1) all water [kind] is " [trait] ; (2) "All men are mortal"; (3) "All ravens are black."
After revision: As formulated by Aristotle, the essence of every thing humans can know exists as an unconditional abstract kind or species: (1) all water [kind] is "" [trait] ; (2) "All men are mortal"; (3) "All ravens are black."