Can Difference Emerge from Undifferentiated Presence?

This paper asks what a metaphysics of primordial Presence must be like if it is to account for determinate difference. The target is not an empty experience or a merely unarticulated thought, but a purportedly fundamental condition prior to distinction, recognition, temporal ordering, and reflective awareness. I argue that absolutely undifferentiated Presence cannot by itself explain how anything could become manifest as this rather than that. If determinate difference is real, then a one-ground account must attribute to primordial Presence an intrinsic conditionability: a capacity for relational articulation and manifestation. I call this Presentability. Presentability is not a second substance, a hidden plurality of objects, or already-reflective awareness. It is the minimal structural capacity without which a fundamental Presence remains unable to account for the world of distinctions it is meant to ground. I then offer a tentative model of reversal and return to show how relational information, bare awareness, and eventually reflective self-relation might arise. The model is explicitly incomplete. Its purpose is to identify the explanatory work still required, not to announce a finished genesis of consciousness.