'Preference framework' is a very general term meant to cover structurally complicated generalizations of utility functions. A preference framework is a fixed framework that determines or updates what the agent prefers for terminal outcomes. For example, the utility indifference set of proposals has the agent switching between utility functions and depending on whether a switch is pressed. We can call this meta-system a 'preference framework' to avoid presuming in advance that it embodies a VNM-coherent utility function.