ble that these should at one and the same time be true, but the opposites to these may sometimes possibly be co-verified about the same thing, as that "not every man is white," and "some man is white." Of such contradictions then of universals, as are universally made, one must necessarily be true or false, and also such as are of singulars, as "Socrates is white," "Socrates is not white;" but of such contradictions as are indeed of universals, yet are not universally made, one is not always true, but the other false. For at one and the same time we may truly say that "man is white," and that "man is not white," and "man is handsome," and "man is not handsome," for if he is deformed he is not handsome, and if any thing is becoming to be, it is, not. This however may at once appear absurd, because the assertion "man is not white," seems at the same time to signify the same thing, as "no man is white," but it neither necessarily signifies the same thing, nor at the same time.
Notwithstanding it is evident that of one affirmation there is one negation, for it is necessary
