Mally’s deontic logic: : Reducibility and semantics

• Autores: Gert-Jan C. Lokhorst
• Localización: Journal of Philosophical Logic, ISSN-e 1573-0433, Vol. 44, Nº. 3, 2015, págs. 309-319
• Idioma: inglés
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• Resumen

  • We discuss three aspects of the intuitionistic reformulation of Mally’s deontic logic that was recently proposed (Journal of Philosophical Logic 42, 635–641, (2013)). 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 (and that does not provide O A → A, which Mally himself did not state either). Third, it is interesting to view Mally’s original deontic logic as an extension of this reformulation