 The point is that after a year either the gunpowder will have exploded, or not. (This is the “real state” which in the EPR situation requires one to assume separability.) The state function, however, will have evolved into a complex superposition over these two alternatives. Provided we maintain the eigenvalue-eigenstate link, the quantum description by means of that state function will yield neither conclusion, and hence the quantum description is incomplete. For a contemporary response to this line of argument, one might look to the program of decoherence. (See  Decoherence.)  That program points to interactions with the environment which may quickly reduce the likelihood of any interference between the “exploded” and the “not-exploded” branches of the evolved psi-function. Then, breaking the eigenvalue-eigenstate link, decoherence adopts a perspective according to which the (almost) non-interfering branches of the psi-function allow that the gunpowder is indeed either exploded or not. Even so, decoherence fails to identify which alternative is actually realized, leaving the quantum description still incomplete. Such decoherence-based interpretations of the psi-function are certainly “artful”, and their adequacy is still under debate (see Schlosshauer 2007, especially Chapter 8).