  The Metaphysics 101 argument can seem Janus-faced: its premises seem utterly shallow, and yet its conclusion seems to resolve a deep ontological debate. One is apt to think, “Sure, what I believe is different from my believing it. And so we can distinguish the content of a belief from the attitude of belief. These contents are propositions. Fine, but now it seems there must be a domain of entities here, whose nature remains to be investigated. How could that be?” One might suspect some sort of equivocation or ambiguity is at work, some oscillation between a shallow and a deep interpretation.