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Tora Koyama
Yamaguchi University
  1.  47
    Against Lewisian Modal Realism From a Metaontological Point of View.Tora Koyama - 2017 - Philosophia 45 (3):1207-1225.
    Modal realism is an ontological position made familiar by David Lewis, according to which there exist possible worlds other than the actual world that we inhabit. It is hard to uphold modal realism, and indeed modal realism has only a few advocates. However, as most contemporary metaphysicians agree, this does not mean that it is easy to refute modal realism. In this paper, I argue against modal realism from a metaontological point of view. First, I provide a precise formulation of (...)
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  2.  98
    A Metaontology-based Objection to Modal Realism.Tora Koyama - 2010 - Kagaku Tetsugaku 43 (1):79-90.
    Modal realism is an ontological claim according to which there exist many possible worlds just like our actual world. Since it is so hard to believe, modal realism has only a few advocates. However, it is well known that alternative theories have serious problems. It is one of the central issues of metaphysics to find a persuasive way to reject modal realism. In this paper, I will suggest that it could be accomplished with help of metaontology-one of the topics of (...)
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  3.  57
    Presentism, Tense, and Truthmaker.Tora Koyama - 2007 - Journal of the Japan Association for Philosophy of Science 34 (2):49-59.
    In this paper, I try to defend Presentism. First of all, I explore how Presentism diverges to its versions and show that none of them, which include the currently standard Presentism that invokes tense logic, are tenable. Next, I point out that some philosophers argue that by replacing the Quinean criterion of existence with the Truthmaker Principle, another version of Presentism, which invokes tensed properties, can emerges. However, this version has a highly implausible conclusion. Finally, I argue that it can (...)
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  4.  10
    The Simple Sentence Puzzle and Ambiguous Co-Referential Names.Tora Koyama & Yasuo Nakayama - 2001 - Annals of the Japan Association for Philosophy of Science 10 (3):127-138.
  5.  6
    What is the Difference Between Philosophy of Science and Analytic Philosophy?:分析哲学と科学哲学はどのように異なっているのか.Tora Koyama - 2018 - Kagaku Tetsugaku 51 (2):29-45.
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  6.  10
    Can Discussions in Metaphysics of Time Be Applied to Mental Time?.Tora Koyama - 2019 - Annals of the Japan Association for Philosophy of Science 28:55-68.
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  7.  1
    Editorial Note for the Special Issue.Tora Koyama - 2020 - Annals of the Japan Association for Philosophy of Science 29:57-59.
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  8.  7
    Truthmaker Monism.Taiji Yukimoto & Tora Koyama - 2020 - Annals of the Japan Association for Philosophy of Science 29:61-73.
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