12 found
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  1.  54
    Two Notions of Epistemic Validity.Horacio Arló Costa & Isaac Levi - 1996 - Synthese 109 (2):217 - 262.
    How to accept a conditional? F. P. Ramsey proposed the following test in (Ramsey 1990).(RT) If A, then B must be accepted with respect to the current epistemic state iff the minimal hypothetical change of it needed to accept A also requires accepting B.
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  2.  26
    First Order Extensions of Classical Systems of Modal Logic; the Role of the Barcan Schemas.Horacio Arló Costa - 2002 - Studia Logica 71 (1):87-118.
    The paper studies first order extensions of classical systems of modal logic (see (Chellas, 1980, part III)). We focus on the role of the Barcan formulas. It is shown that these formulas correspond to fundamental properties of neighborhood frames. The results have interesting applications in epistemic logic. In particular we suggest that the proposed models can be used in order to study monadic operators of probability (Kyburg, 1990) and likelihood (Halpern-Rabin, 1987).
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  3.  34
    Non-Adjunctive Inference and Classical Modalities.Horacio Arló Costa - 2004 - Journal of Philosophical Logic 34 (5/6):581 - 605.
    The article focuses on representing different forms of non-adjunctive inference as sub-Kripkean systems of classical modal logic, where the inference from □A and □B to □A ∧ B fails. In particular we prove a completeness result showing that the modal system that Schotch and Jennings derive from a form of non-adjunctive inference in (Schotch and Jennings, 1980) is a classical system strictly stronger than EMN and weaker than K (following the notation for classical modalities presented in Chellas, 1980). The unified (...)
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  4.  18
    Rationality and Value: The Epistemological Role of Indeterminate and Agent-Dependent Values.Horacio Arló Costa - 2005 - Philosophical Studies 128 (1):7-48.
    An important trend in contemporary epistemology centers on elaborating an old idea of pragmatist pedigree: theory selection (and in general the process of changing view and fixing beliefs) presupposes epistemic values. This article focuses on analyzing the case where epistemic values are indeterminate or when the sources of valuation are multiple (epistemic values like coherence and simplicity need not order options in compatible ways). According to the theory that thus arises epistemic alternatives need not be fully ordered by an underlying (...)
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  5.  12
    Two Notions of Epistemic Validity-Epistemic Models for Ramsey's Conditionals.Horacio Arló Costa & Isaac Levi - 1996 - Synthese 109 (2):217-262.
    How to accept a conditional? F. P. Ramsey proposed the following test in . 'If A, then B' must be accepted with respect to the current epistemic state iff the minimal hypothetical change of it needed to accept A also requires accepting B. In this article we propose a formulation of , which unlike some of its predecessors, is compatible with our best theory of belief revision, the so-called AGM theory , chapters 1-5 for a survey). The new test, which, (...)
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  6. Iterated Random Selection as Intermediate Between Risk and Uncertainty.Horacio Arlo Costa & Jeffrey Helzner - 2009 - ISIPTA'09 ELECTRONIC PROCEEDINGS.
  7.  3
    A Representation Result for Value-Based Contraction.Horacio Arló Costa & Hailin Liu - forthcoming - Journal of Philosophical Logic:1-25.
    Sven-Ove Hansson and Erik Olsson studied in Hansson and Olsson, 103–119 1995) the logical properties of an operation of contraction first proposed by Isaac Levi in Levi. They provided a completeness result for the simplest version of contraction that they call Levi-contraction but left open the problem of characterizing axiomatically the more complex operation of value-based contraction or saturatable contraction. In this paper we propose an axiomatization for this operation and prove a completeness result for it. We argue that the (...)
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  8.  49
    More Foundations of the Decision Sciences: Introduction.Horacio Arló Costa & Jeffrey Helzner - 2012 - Synthese 187 (1):1-10.
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  9.  9
    Hypothetical Revision and Matter-of-Fact Supposition.Horacio Arló Costa - 2001 - Journal of Applied Non-Classical Logics 11 (1-2):203-229.
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  10.  18
    Review of David Papineau, The Roots of Reason: Philosophical Essays on Rationality, Evolution, and Probability[REVIEW]Horacio Arlo Costa - 2003 - Notre Dame Philosophical Reviews 2003 (12).
  11.  7
    Decision-Theoretic Contraction and Sequential Change.Horacio Arlo Costa - 2006 - In Erik J. Olsson (ed.), Knowledge and Inquiry: Essays on the Pragmatism of Isaac Levi. Cambridge University Press.
  12. Desire-as-Belief Implies Opinionation or Indifference.Horacio ArlÓ Costa & Alonso Church - 1995 - Analysis 55 (1):2.
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