Final answer:
Imaginative resistance highlights difficulties in accepting fictional moral counterfactuals that conflict with real-world moral beliefs, questioning the extent to which moral fictionalism can modify our moral understanding.
Step-by-step explanation:
The phenomenon of imaginative resistance refers to difficulties experienced when attempting to entertain moral propositions in a fictional context that sharply contrast with our real-world moral intuitions. This resistance can be challenging to overcome, even in thought experiments, especially when considering scenarios that involve actions that are gravely morally wrong in our world. The scenario provided, where the act of 'destroying all possible worlds' is considered neutral, demonstrates the difficulty in reprogramming our moral intuitions even in a fictional or counterfactual context.
Fiction writers use their imagination to create worlds that are not bound by the reality we know, while readers may apply critical thinking and engage in a strong counterexample method to question underlying moral norms. However, the moral fictionalism debate considers whether such imaginative exercises can meaningfully alter or inform our moral understanding. The given example argues that moral fictionalists might see imaginative resistance as evidence that while we can often engage with fictional worlds, there is a limit to how much these worlds can 'reprogram' our deep-seated moral beliefs.