Why follow the royal rule?
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- Huber, F. Synthese (2017) 194: 1565. doi:10.1007/s11229-015-1004-x
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This note is a sequel to Huber (Synthese 191:2167–2193, 2014). It is shown that obeying a normative principle relating counterfactual conditionals and conditional beliefs, viz. the royal rule, is a necessary and sufficient means to attaining a cognitive end that relates true beliefs in purely factual, non-modal propositions and true beliefs in purely modal propositions. Along the way I will sketch my idealism about alethic or metaphysical modality.