 Having considered all these views and found them wanting, Auriol offers his own alternative: the only way to explain at once essential predication, intellectual acquaintance with extra-mental objects, and necessary, scientific knowledge is to maintain that concepts are extra-mental particulars, but having a different type of existence (modus essendi) from the real existence they have extra-mentally. This special type of existence Auriol terms esse apparens, apparent being, but he uses many synonyms for it, including “intentional” or “objective” existence. (For other synonyms, see Tachau 1988, p. 90.) What characterizes this type of existence is that it is a particular extra-mental object, e.g., Socrates, but indistinguishably mixed together (indistinguibiliter immiscetur) with passive conception, i.e. the formation of a concept of Socrates. A concept of Socrates is Socrates as conceived.