 If the Schrödinger equation were a dynamical law governing the evolution of a physical quantum state this would provide a physical foundation on which to base a reduction of classical dynamics to quantum dynamics that appealed to quantum decoherence. But QBists deny that the Schrödinger equation is a dynamical law governing the evolution of an objective quantum state. For them it merely provides a constraint on an agent’s current epistemic state. Fuchs (2010,  Other Internet Resources)  concluded that decoherence has no role to play in the misguided program attempting to reduce classical to quantum dynamics.