clearstream
(He, Him)
Yes, although I am adding that which is imagined among them. So that the world as it is imagined, and the events that are imagined to be going on within it, can be causal (given the cognitive facts that amount to their imagining.) Else it becomes rather elliptical to explain normal human cognitive activities such as planning (a plan is imagined, and then acted on: the formed plan is a step in a causal chain even if it exists only in imagination.)Which is exactly what pemerton has said. The imaginary world simply--flatly--does not exist. Our beliefs and attitudes exist, and those beliefs and attitudes can interact, evolve, and be coherent or incoherent with one or more other beliefs/attitudes. These beliefs/attitudes are causative agents, even though they fail to refer in any way because there simply isn't anything for them to refer to.
I would count among those beliefs things we choose to imagine, seeing as they have no real counterpart. Supposing we agree that our fiction is that which we pretend to be true while knowing it is false, and are content to use descriptions such as "M imagines A to exist in a world and be capable of casting spells". Then it's unclear why pretences adopted about said world and A within it (as cognitive facts) cannot be counted among the causes of later behaviours.The current King of France doesn't exist, because there is no King of France, it hasn't been a monarchy for 150 years (not since the Second French Empire was abolished and replaced by the Third French Republic.) But it is possible for us to have beliefs or attitudes about "the current King of France", and for those beliefs or attitudes to agree or conflict with one another, and for those beliefs or attitudes to be causative agents for future actions on someone's part.
Other beliefs may well be necessary, but it seems hard to say that are sufficient without including the specifics of what was imagined. I'd likely subscribe to some sort of multiple-drafts explanation of the development of fiction in TTRPG, implying consensus is another necessity (i.e. I'm not discounting social factors among causes.)
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