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Deontic modals and hyperintensionality

Faroldi, Federico

2019

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  • Título:
    Deontic modals and hyperintensionality
  • Autor: Faroldi, Federico
  • Assuntos: Arts and Architecture ; Deontic modals ; hyperintensionality ; LOGIC ; SEMANTICS ; truthmaker semantics
  • Notas: ISSN: 1368-9894
    ISSN: 1367-0751
    LOGIC JOURNAL OF THE IGPL
  • Descrição: In this paper I argue that deontic modals are hyperintensional, i.e. logically equivalent contents cannot be substituted in their scope. I give two arguments, one deductive and the other abductive. First, I show that the contrary thesis (that deontic modals are not hyperintensional) leads to falsity; second, I argue that a hyperintensional theory of deontic modals fares better than its rivals in terms of elegance, theoretical simplicity and explanatory power (e.g. Ross's paradox, the Gentle Murderer, The Good Samaritan, Free Choice Permission and the Miners' Paradox disappear). I then propose a philosophical analysis of this thesis and outline some consequences. In Section 1 I introduce and define deontic modality and hyperintensionality. In Section 2 I give a reductio for the hyperintensionality of deontic modals. If the argument is sound, a useful corollary is that deontic modals are also non-intensional, and therefore possible-world semantics accounts are illfitted for them. I then show how the main result can be strengthened or weakened by varying the definition of logical validity. In Section 3 I give an abductive argument for the hyperintensionality of deontic modals, arguing that with a single move we are able to solve many paradoxes and puzzles traditionally troubling deontic logic. I present a version of a hyperintensional deontic logic in an appendix, which I prove is sound and complete with respect to a version of truthmaker semantics.
  • Data de criação/publicação: 2019
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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