[Booktrope]

Wait! Contingent was just defined as everything that's not necessary. Not contingent with its normal meaning of dependent on something else. Like, a square has 4 sides, that's necessary for it to be called a square, but it might or might not depend on something else for that quality. Or a square is blue, that's contingent (i.e., what's not necessary in this usage for it to be called a square), and it might or might not depend on something else.

If you are using "contingent" with its normal meaning, the idea is absurd. We can divide everything that exists into "necessary" and "contingent", one or the other? We might as well divide everything into edible and picturesque, for example. Words, but more like word salad than meaningful statements.