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  1. added 2018-12-31
    In Defense of the Possibilism-Actualism Distinction.Christopher Menzel - forthcoming - Philosophical Studies.
    In Modal Logic as Metaphysics, Timothy Williamson claims that the possibilism-actualism (P-A) distinction is badly muddled. In its place, he introduces a necessitism-contingentism (N-C) distinction that he claims is free of the confusions that purportedly plague the P-A distinction. In this paper I argue first that the P-A distinction, properly understood, is historically well-grounded and entirely coherent. I then look at the two arguments Williamson levels at the P-A distinction and find them wanting and show, moreover, that, when the N-C (...)
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  2. added 2018-07-15
    The Epistemology of Modality and the Problem of Modal Epistemic Friction.Anand Jayprakash Vaidya & Michael Wallner - forthcoming - Synthese:1-27.
    There are three theories in the epistemology of modality that have received sustained attention over the past 20 years : conceivability-theory, counterfactual-theory, and deduction-theory. In this paper we argue that all three face what we call the problem of modal epistemic friction. One consequence of the problem is that for any of the three accounts to yield modal knowledge, the account must provide an epistemology of essence. We discuss an attempt to fend off the problem within the context of the (...)
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  3. added 2018-07-15
    Knowing How Things Might Have Been.Mark Jago - 2018 - Synthese:1-19.
    I know that I could have been where you are right now and that you could have been where I am right now, but that neither of us could have been turnips or natural numbers. This knowledge of metaphysical modality stands in need of explanation. I will offer an account based on our knowledge of the natures, or essencess, of things. I will argue that essences need not be viewed as metaphysically bizarre entities; that we can conceptualise and refer to (...)
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  4. added 2018-06-16
    Essential Bundle Theory and Modality.Mark Jago - 2018 - Synthese:1-16.
    Bundle theories identify material objects with bundles of properties. On the traditional approach, these are the properties possessed by that material object. That view faces a deep problem: it seems to say that all of an object’s properties are essential to it. Essential bundle theory attempts to overcome this objection, by taking the bundle as a specification of the object’s essential properties only. In this paper, I show that essential bundle theory faces a variant of the objection. To avoid the (...)
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  5. added 2018-03-24
    Modeling Unicorns and Dead Cats: Applying Bressan’s ML Ν to the Necessary Properties of Non-Existent Objects.Tyke Nunez - 2018 - Journal of Philosophical Logic 47 (1):95–121.
    Should objects count as necessarily having certain properties, despite their not having those properties when they do not exist? For example, should a cat that passes out of existence, and so no longer is a cat, nonetheless count as necessarily being a cat? In this essay I examine different ways of adapting Aldo Bressan’s MLν so that it can accommodate an affirmative answer to these questions. Anil Gupta, in The Logic of Common Nouns, creates a number of languages that have (...)
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  6. added 2017-09-28
    The Broadest Necessity.Andrew Bacon - 2018 - Journal of Philosophical Logic 47 (5):733-783.
    In this paper the logic of broad necessity is explored. Definitions of what it means for one modality to be broader than another are formulated, and it is proven, in the context of higher-order logic, that there is a broadest necessity, settling one of the central questions of this investigation. It is shown, moreover, that it is possible to give a reductive analysis of this necessity in extensional language. This relates more generally to a conjecture that it is not possible (...)
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  7. added 2017-09-08
    Priority Monism.Kelly Trogdon - 2017 - Philosophy Compass 12 (11):1-10.
    According to priority monism there are many concrete entities and there is one, the cosmos, that is ontologically prior to all the others. I begin by clarifying this thesis as well as its main rival, priority atomism. I show how the disagreement between the priority monist and atomist ultimately turns on how the thesis of concrete foundationalism is implemented. While it’s standard to interpret priority monism as being metaphysically non-contingent, I show that there are two competing, prima facie plausible conceptions (...)
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  8. added 2017-07-25
    Automating Leibniz's Theory of Concepts.Jesse Alama, Paul Edward Oppenheimer & Edward Zalta - 2015 - In Amy P. Felty & Aart Middeldorp (eds.), Automated Deduction – CADE 25: Proceedings of the 25th International Conference on Automated Deduction (Lecture Notes in Artificial Intelligence: Volume 9195), Berlin: Springer. Dordrecht: Springer. pp. 73-97.
    Our computational metaphysics group describes its use of automated reasoning tools to study Leibniz’s theory of concepts. We start with a reconstruction of Leibniz’s theory within the theory of abstract objects (henceforth ‘object theory’). Leibniz’s theory of concepts, under this reconstruction, has a non-modal algebra of concepts, a concept-containment theory of truth, and a modal metaphysics of complete individual concepts. We show how the object-theoretic reconstruction of these components of Leibniz’s theory can be represented for investigation by means of automated (...)
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  9. added 2017-07-17
    Grounding, Essence, And Identity.Fabrice Correia & Alexander Skiles - 2017 - Philosophy and Phenomenological Research.
    Recent metaphysics has turned its focus to two notions that are—as well as having a common Aristotelian pedigree—widely thought to be intimately related: grounding and essence. Yet how, exactly, the two are related remains opaque. We develop a unified and uniform account of grounding and essence, one which understands them both in terms of a generalized notion of identity examined in recent work by Fabrice Correia, Cian Dorr, Agustín Rayo, and others. We argue that the account comports with antecedently plausible (...)
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  10. added 2017-02-13
    Abstract Universes and Quantifying In.Donald E. Stahl - 1986 - Philosophia 16 (3-4):333-344.
    Philosophia (Israel), 16(3-4), 333 - 344. YEAR: 1986 Extensive corrigenda Vol. 17, no. 3. -/- SUBJECT(S): Quine's second thoughts on quantifying in, appearing in the second, revised edition of _From a Logical Point of View_ of 1961, are shown to be incorrect. His original thoughts were correct. ABSTRACT: Additional tumult is supplied to pp. 152-154 of _From A Logical Point of View_, showing that being dated is no guarantee of being right. Among other things, it is shown that Quine's argument (...)
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  11. added 2017-01-18
    Contingent Existence and the Reduction of Modality to Essence.Trevor Teitel - forthcoming - Mind:fzx001.
    This paper first argues that we can bring out a tension between the following three popular doctrines: (i) the canonical reduction of metaphysical modality to essence, due to Fine, (ii) contingentism, which says that possibly something could have failed to be something, and (iii) the doctrine that metaphysical modality obeys the modal logic S5. After presenting two such arguments (one from the theorems of S4 and another from the theorems of B), I turn to exploring various conclusions we might draw (...)
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  12. added 2016-11-06
    Modal Science.Timothy Williamson - 2016 - Canadian Journal of Philosophy 46 (4-5):453-492.
    This paper explains and defends the idea that metaphysical necessity is the strongest kind of objective necessity. Plausible closure conditions on the family of objective modalities are shown to entail that the logic of metaphysical necessity is S5. Evidence is provided that some objective modalities are studied in the natural sciences. In particular, the modal assumptions implicit in physical applications of dynamical systems theory are made explicit by using such systems to define models of a modal temporal logic. Those assumptions (...)
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  13. added 2016-10-16
    Contingent Existence and Iterated Modality.Cian Dorr - 2017 - Analysis 77 (1):155-165.
    A discussion of a view, defended by Robert Adams and Boris Kment, according to which contingent existence requires rejecting many standard principles of propositional modal logic involving iterated modal operators.
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  14. added 2015-10-20
    Logic, Essence, and Modality — Review of Bob Hale's Necessary Beings. [REVIEW]Christopher Menzel - 2015 - Philosophia Mathematica 23 (3):407-428.
    Bob Hale’s distinguished record of research places him among the most important and influential contemporary analytic metaphysicians. In his deep, wide ranging, yet highly readable book Necessary Beings, Hale draws upon, but substantially integrates and extends, a good deal his past research to produce a sustained and richly textured essay on — as promised in the subtitle — ontology, modality, and the relations between them. I’ve set myself two tasks in this review: first, to provide a reasonably thorough (if not (...)
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  15. added 2015-09-04
    Identidad, Posibilidad y Esencia: Una paradoja.Carlos Romero - 2014 - In Lourdes Valdivia (ed.), La Identidad: su Semántica y su Metafísica. Una Aproximación Desde la Filosofía Analítica. Facultad de Filosofía y Letras, UNAM. pp. 55-91.
    En este artículo discuto cómo es que la idea intuitiva de que las cosas podrían cambiar, combinada con principios excesivamente plausibles, nos lleva a la paradoja de Chisholm. Arguyo que la mejor respuesta a esta paradoja –pues efectúa la menor mutilación a nuestros principios teóricos y asunciones intuitivas– es la postura esencialista. Primero expongo algunas motivaciones para hacer una teoría metafísica que explique la modalidad de re. Luego reviso los principios a los que estaremos regresando en el curso del artículo. (...)
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  16. added 2014-03-04
    Essentialism Vis-À-Vis Possibilia, Modal Logic, and Necessitism.Sonia Roca-Royes - 2011 - Philosophy Compass 6 (1):54-64.
    Pace Necessitism – roughly, the view that existence is not contingent – essential properties provide necessary conditions for the existence of objects. Sufficiency properties, by contrast, provide sufficient conditions, and individual essences provide necessary and sufficient conditions. This paper explains how these kinds of properties can be used to illuminate the ontological status of merely possible objects and to construct a respectable possibilist ontology. The paper also reviews two points of interaction between essentialism and modal logic. First, we will briefly (...)
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  17. added 2013-02-11
    A New Semantics for Systems of Logic of Essence.Alessandro Giordani - 2014 - Studia Logica 102 (3):411-440.
    The purpose of the present paper is to provide a way of understanding systems of logic of essence by introducing a new semantic framework for them. Three central results are achieved: first, the now standard Fitting semantics for the propositional logic of evidence is adapted in order to provide a new, simplified semantics for the propositional logic of essence; secondly, we show how it is possible to construe the concept of necessary truth explicitly by using the concept of essential truth; (...)
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  18. added 2012-04-02
    Peacocke’s Principle-Based Account of Modality: “Flexibility of Origins” Plus S4.Sonia Roca-Royes - 2006 - Erkenntnis 65 (3):405-426.
    Due to the influence of Nathan Salmon’s views, endorsement of the “flexibility of origins” thesis is often thought to carry a commitment to the denial of S4. This paper rejects the existence of this commitment and examines how Peacocke’s theory of the modal may accommodate flexibility of origins without denying S4. One of the essential features of Peacocke’s account is the identification of the Principles of Possibility, which include the Modal Extension Principle (MEP), and a set of Constitutive Principles. Regarding (...)
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