  The conspiracy of ontic states responding to measurements contextually to
comply with noncontextual quantum mechanical probabilities is analyzed for
general ontological models. A general physical picture of ontological space
structure and how ontic states are disturbed by measurement contexts is
presented. A common assumption in ontological models called lambda-sufficiency
is analyzed and argued to be inconsistent with measurement contextuality for
ontological models with certain symmetry in ontic space with respect to quantum
states and measurements.
