 One taking Healey’s pragmatist approach to quantum theory could reply as follows (see Healey 2020, §7.7). The primary target of an explanatory application of quantum theory is not a collection of events but a probabilistic phenomenon they manifest. A probabilistic phenomenon is a probabilistic data model of a statistical regularity. One explains the phenomenon by demonstrating how the probabilities of the model are a consequence of the Born rule, as applied to events that manifest the regularity. Since the explanandum is not itself a physical condition, it is inappropriate to demand a physical explanans (such as a physically real quantum state). But the demonstration is explanatory only if each event manifesting the regularity itself depended on whatever physical conditions obtained, including whatever conditions backed assignment of the quantum state input to the Born rule. One can have good evidence for such backing conditions while unable to specify exactly what they are. The more complete the description of the physical conditions on which each event manifesting the regularity depended, the better the explanation of the probabilistic phenomenon they manifest.