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  1. Quantum Metaphysical Indeterminacy and Worldly Incompleteness.Alessandro Torza - 2017 - Synthese:1-14.
    An influential theory has it that metaphysical indeterminacy occurs just when reality can be made completely precise in multiple ways. That characterization is formulated by employing the modal apparatus of ersatz possible worlds. As quantum physics taught us, reality cannot be made completely precise. I meet the challenge by providing an alternative theory which preserves the use of ersatz worlds but rejects the precisificational view of metaphysical indeterminacy. The upshot of the proposed theory is that it is metaphysically indeterminate whether (...)
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  • Impossible Worlds and Partial Belief.Edward Elliott - 2019 - Synthese 196 (8):3433-3458.
    One response to the problem of logical omniscience in standard possible worlds models of belief is to extend the space of worlds so as to include impossible worlds. It is natural to think that essentially the same strategy can be applied to probabilistic models of partial belief, for which parallel problems also arise. In this paper, I note a difficulty with the inclusion of impossible worlds into probabilistic models. Under weak assumptions about the space of worlds, most of the propositions (...)
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  • Realizm modalny i okresy warunkowe z niemożliwymi poprzednikami [Modal Realism and Counterpossibles].Maciej Sendłak - 2014 - Filozofia Nauki 22 (4).
    To solve the problem of counterpossibles, many philosophers have been arguing that one needs to invoke impossible worlds. This extension of the ontology of modality should save the analysis of counterfactuals from being insensitive to the problem of counterpossibles. Since theories of impossible worlds are extensions of original accounts of modalities, it is worth stressing that proper analyses of counterpossibles should not weaken the latter.In this paper I argue that these theories of impossible wolrds, which are based on D. Lewis' (...)
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  • Impossibility and Impossible Worlds.Daniel Nolan - forthcoming - In Otavio Bueno & Scott Shalkowski (eds.), The Routledge Handbook of Modality. New York, USA: Routledge Press.
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  • Concrete Impossible Worlds.Martin Vacek - 2013 - Filozofia 68 (6):523-530.
    The paper deals with such a modification of genuine modal realism as to accommodate impossible worlds into its ontology. First of all, the theory of modal realism is presented. Next, several motivations for the acceptance of impossible worlds are adduced. Further, Lewis’s argument against impossible worlds is presented. It is argued that the argument can be weakened by rejection of one of its premises. Finally, two objections against the proposal are countered. Although my strategy accounts for the Opinion concerning the (...)
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  • Counterpossibles.Barak Krakauer - 2012 - Dissertation, University of Massachusetts
    Counterpossibles are counterfactuals with necessarily false antecedents. The problem of counterpossibles is easiest to state within the "nearest possible world" framework for counterfactuals: on this approach, a counterfactual is true when the consequent is true in the "nearest" possible world where the antecedent is true. Since counterpossibles have necessarily false antecedents, there is no possible world where the antecedent is true. On the approach favored by Lewis, Stalnaker, Williamson, and others, counterpossibles are all trivially true. I introduce several arguments against (...)
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  • Impossible Worlds.Mark Jago - 2013 - Noûs 47 (3):713-728.
    Impossible worlds are representations of impossible things and impossible happenings. They earn their keep in a semantic or metaphysical theory if they do the right theoretical work for us. As it happens, a worlds-based account provides the best philosophical story about semantic content, knowledge and belief states, cognitive significance and cognitive information, and informative deductive reasoning. A worlds-based story may also provide the best semantics for counterfactuals. But to function well, all these accounts need use of impossible and as well (...)
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  • Modal Meinongianism and Fiction: The Best of Three Worlds.Francesco Berto - 2011 - Philosophical Studies 152 (3):313-35.
    We outline a neo-Meinongian framework labeled as Modal Meinongian Metaphysics (MMM) to account for the ontology and semantics of fictional discourse. Several competing accounts of fictional objects are originated by the fact that our talking of them mirrors incoherent intuitions: mainstream theories of fiction privilege some such intuitions, but are forced to account for others via complicated paraphrases of the relevant sentences. An ideal theory should resort to as few paraphrases as possible. In Sect. 1, we make this explicit via (...)
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  • 'Identity' Without Identity.Alessandro Torza - 2012 - Mind 121 (481):67-95.
    I introduce and defend the semantic notion of counterfactual identity, distinguishing it from the metaphysical notion of transworld identity. After showing that Lewis's counterpart theory misconstrues counterfactual identity facts, I outline and motivate a ‘Leibnizian counterpart theory’ where the notion of counterfactual identity is adequately modelled. Finally, I show that counterfactual identity can be characterized without relying on some implausible features of Lewis's theory of conditionals.
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  • What Are Impossible Worlds?Barak Krakauer - 2013 - Philosophical Studies 165 (3):989-1007.
    In this paper, I argue for a particular conception of impossible worlds. Possible worlds, as traditionally understood, can be used in the analysis of propositions, the content of belief, the truth of counterfactuals, and so on. Yet possible worlds are not capable of differentiating propositions that are necessarily equivalent, making sense of the beliefs of agents who are not ideally rational, or giving truth values to counterfactuals with necessarily false antecedents. The addition of impossible worlds addresses these issues. The kinds (...)
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  • The Truth About Impossibility.Janine Reinert - 2018 - Philosophical Quarterly 68 (271):307-327.
    Any worlds semantics for intentionality has to provide a plenitudinous theory of impossibility: For any impossible proposition, it should provide a world where it is true. Hence, also any semantics for impossibility statements that extends Lewis’s concretism about possible worlds should be plenitudinous. However, several such proposals for impossibilist semantics fail to accommodate two kinds of impossibility that, albeit not unheard of, have been largely neglected in the literature on impossible worlds, but that are bound to arise in the Lewisian (...)
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  • Variations on a Montagovian Theme.Wolfgang Schwarz - 2013 - Synthese 190 (16):3377-3395.
    What are the objects of knowledge, belief, probability, apriority or analyticity? For at least some of these properties, it seems plausible that the objects are sentences, or sentence-like entities. However, results from mathematical logic indicate that sentential properties are subject to severe formal limitations. After surveying these results, I argue that they are more problematic than often assumed, that they can be avoided by taking the objects of the relevant property to be coarse-grained (“sets of worlds”) propositions, and that all (...)
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  • Propositions, Possible Worlds, and Recursion.Andrzej Wiśniewski - 2011 - Logic and Logical Philosophy 20 (1-2):73-79.
    The issue of reduction of propositions to sets of possible worlds is addressed. It is shown that, under some natural assumptions, there always exist recursive propositions, i.e. decidable sets of possible worlds, which are not assigned to any sentence of a language. Some consequences of this result are discussed.
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  • Careful What You Wish.John Beverley - 2018 - Philosophia 46 (1):21-38.
    Dilip Ninan has raised a puzzle for centered world accounts of de re attitude reports extended to accommodate what he calls “counterfactual attitudes.” As a solution, Ninan introduces multiple centers to the standard centered world framework, resulting in a more robust semantics for de re attitude reports. However, while the so-called multi-centered world proposal solves Ninan’s counterfactual puzzle, this additional machinery is not without problems. In Section 1, I present the centered world account of attitude reports, followed by the extension (...)
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  • Limits of Hybrid Modal Realism.Maciej Sendłak - 2015 - Axiomathes 25 (4):515-531.
    The aim of this paper is to point out the limitations of Hybrid Modal Realism as a general theory of modalities, i.e. one that gives an analysis of possibilities as well as impossibilities. To do so we will firstly sketch the goals that theories of impossible worlds should achieve. Secondly we will briefly present the two most popular accounts of impossibilities—Extended Modal Realism and Extended Ersatzism. We will focus on the aspects of both theories which became the motivation for a (...)
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  • Hyperintensional Propositions.Mark Jago - 2015 - Synthese 192 (3):585-601.
    Propositions play a central role in contemporary semantics. On the Russellian account, propositions are structured entities containing particulars, properties and relations. This contrasts sharply with the sets-of-possible-worlds view of propositions. I’ll discuss how to extend the sets-of-worlds view to accommodate fine-grained hyperintensional contents. When this is done in a satisfactory way, I’ll argue, it makes heavy use of entities very much like Russellian tuples. The two notions of proposition become inter-definable and inter-substitutable: they are not genuinely distinct accounts of how (...)
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  • Constructing Worlds.Mark Jago - 2012 - Synthese 189 (1):59-74.
    You and I can differ in what we say, or believe, even though the things we say, or believe, are logically equivalent. Discussing what is said, or believed, requires notions of content which are finer-grained than sets of (metaphysically or logically) possible worlds. In this paper, I develop the approach to fine-grained content in terms of a space of possible and impossible worlds. I give a method for constructing ersatz worlds based on theory of substantial facts. I show how this (...)
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  • Curiosity Kills the Categories: A Dilemma About Categories and Modality.Sophie R. Allen - 2015 - Metaphysica 16 (2).
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