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  1. Notes on Mally’s Deontic Logic and the Collapse of Modalities.Stefania Centrone - 2013 - Synthese 190 (18):4095-4116.
    This paper analyzes Mally’s system of deontic logic, introduced in his The Basic Laws of Ought: Elements of the Logic of Willing (1926). We discuss Mally’s text against the background of some contributions in the literature which show that Mally’s axiomatic system for deontic logic is flawed, in so far as it derives, for an arbitrary A, the theorem “A ought to be the case if and only if A is the case”, which represents a collapse of obligation. We then (...)
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  • Mally’s Deontic Logic: Reducibility and Semantics.Gert-Jan C. Lokhorst - 2015 - Journal of Philosophical Logic 44 (3):309-319.
    We discuss three aspects of the intuitionistic reformulation of Mally’s deontic logic that was recently proposed ). First, this reformulation is more similar to Standard Deontic Logic than appears at first sight: like Standard Deontic Logic, it is Kanger reducible and Anderson reducible to alethic logic and it has a semantical interpretation that can be read in deontic terms. Second, this reformulation has an extension that provides 100% of the theorems stated by Mally himself. Third, it is interesting to view (...)
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