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Metaphysical Necessity and Modal Logics

Philip L. Quinn

The Monist 65 (4):444-455 (1982)

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Branching actualism and cosmological arguments.Joseph C. Schmid & Alex Malpass - 2023 - Philosophical Studies 180 (7):1951-1973.details We draw out significant consequences of a relatively popular theory of metaphysical modality—branching actualism—for cosmological arguments for God’s existence. According to branching actualism, every possible world shares an initial history with the actual world and diverges only because causal powers (or dispositions, or some such) are differentially exercised. We argue that branching actualism undergirds successful responses to two recent cosmological arguments: the Grim Reaper Kalam argument and a modal argument from contingency. We also argue that branching actualism affords a response (...) Download Export citation Bookmark 2 citations
Anderson’s Restriction of Deontic Modalities to Contingent Propositions.Matteo Pascucci - 2017 - Theoria 83 (4):440-470.details The deontic status of tautologies and contradictions is one of the major puzzles for authors of early works on deontic logic. It is well-known that von Wright addresses this problem by adopting a Principle of Deontic Contingency, which says that tautologies are not necessarily obligatory and contradictions are not necessarily forbidden. A more radical solution is proposed by Anderson within a reductionist approach to deontic logic and consists in restricting the range of application of deontic modalities to contingent propositions. Anderson’s (...) Download Export citation Bookmark 1 citation
Antirealism and the Conditional Fallacy: The Semantic Approach.Patrick Girard & Luca Moretti - 2014 - Journal of Philosophical Logic 43 (4):761-783.details The expression conditional fallacy identifies a family of arguments deemed to entail odd and false consequences for notions defined in terms of counterfactuals. The antirealist notion of truth is typically defined in terms of what a rational enquirer or a community of rational enquirers would believe if they were suitably informed. This notion is deemed to entail, via the conditional fallacy, odd and false propositions, for example that there necessarily exists a rational enquirer. If these consequences do indeed follow from (...) Download Export citation Bookmark
Axiomatizing norms across time and the 'Paradox of the Court'.Daniela Glavaničová & Matteo Pascucci - 2021 - In Fenrong Liu, Alessandra Marra, Paul Portner & Frederik Van de Putte (eds.), Deontic Logic and Normative Systems. Proceedings of DEON 2020/2021. College Publications. pp. 201-218.details In normative reasoning one typically refers to intervals of time across which norms are intended to hold, as well as to alternative possibilities representing hypothetical developments of a given scenario. Thus, deontic modalities are naturally intertwined with temporal and metaphysical ones. Furthermore, contemporary debates in philosophy suggest that a proper understanding of fundamental ethical principles, such as the Ought-Implies-Can thesis, requires a simultaneous analysis of these three families of concepts. In the present article we propose a general formal framework which (...) Download Export citation Bookmark
The epistemology of evil possibilities.Paul Tidman - 1993 - Faith and Philosophy 10 (2):181-197.details In this paper I defend the Anselmian conception of God as a necessary being who is necessarily omnipotent, omniscient, and perfectly good against arguments that attempt to show that we have good reason to think there are evil possible worlds in which either God does not exist or in which He lacks at least one of these attributes. I argue that the critics of Anselmianism have failed to provide any compelling reason to think such worlds are possible. The best the (...) Download Export citation Bookmark 5 citations

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