“For Einstein, externality is a relation of spatial separation. For Bohr, on the other hand, the individuation of “observer” from “observed” is not the result of spacetime separability, because one cannot help oneself to spacetime descriptions. Rather, individuation is the result of specific intra-actions that entail the larger material arrangement. In my elaboration of Bohr’s account, I argue that objectivity is premised on an agential (or enacted) ontological separability, an individuation-within-and-as-part-of-the-phenomenon enacted in the placement of the cut between “observer” and “observed,” rather than an absolute notion of externality.”