The existential status of such models is clearly different from that of the actions. They are held by actors, but by holding them the actors are not mak- ing or trying to make an impact on the world: holding a model of action is not “doing” or “intending to do” anything. Moreover, they are perduring over time: they do not lapse after the action has been performed. Such models form part of an individual’s knowledge and are part of social life to the extent to which they are shared among individuals. on both existential and epistemic