  Any realist interpretation of quantum theory must grapple with the
measurement problem and the status of state-vector collapse. In a no-collapse
approach, measurement is typically modeled as a dynamical process involving
decoherence. We describe how the minimal modal interpretation closes a gap in
this dynamical description, leading to a complete and consistent resolution to
the measurement problem and an effective form of state collapse. Our
interpretation also provides insight into the indivisible nature of
measurement--the fact that you can't stop a measurement part-way through and
uncover the underlying `ontic' dynamics of the system in question. Having
discussed the hidden dynamics of a system's ontic state during measurement, we
turn to more general forms of open-system dynamics and explore the extent to
which the details of the underlying ontic behavior of a system can be
described. We construct a space of ontic trajectories and describe obstructions
to defining a probability measure on this space.
