In the first place, the syllogisms of existence all have one another for presupposition, and the extremes conjoined in the conclusion are truly conjoined, in and for themselves, only inasmuch as they are otherwise united by an identity grounded elsewhere; the middle term, as constituted in the syllogisms we have examined, ought to be the conceptual unity of these syllogisms but is in fact only a formal determinateness that is not posited as their concrete unity.