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Justin Bledin
Johns Hopkins University
  1.  47
    Logic Informed.Justin Bledin - 2014 - Mind 123 (490):277-316.
    Do logically valid arguments necessarily preserve truth? Certain inferences involving informational modal operators and indicative conditionals suggest that truth preservation and good deductive argument come apart. Given this split, I recommend an alternative to the standard truth preservation view of logic on which validity and good deductive argument coincide: logic is a descriptive science that is fundamentally concerned not with the preservation of truth, but with the preservation of structural features of information. Along the way, I defend modus ponens for (...)
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  2.  77
    Modus Ponens Defended.Justin Bledin - 2015 - Journal of Philosophy 112 (2):57-83.
    Is modus ponens valid for the indicative conditional? McGee [1985] famously presents several alleged counterexamples to this inference rule. More recently, Kolodny and MacFarlane [2010] and Willer [2010] argue that modus ponens is unreliable in certain hypothetical contexts. However, none of these attacks undermines an informational conception of logic on which modus ponens is valid.
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  3.  43
    Closure and Epistemic Modals.Justin Bledin & Tamar Lando - 2018 - Philosophy and Phenomenological Research 97 (1):3-22.
    According to a popular closure principle for epistemic justification, if one is justified in believing each of the premises in set Φ and one comes to believe that ψ on the basis of competently deducing ψ from Φ—while retaining justified beliefs in the premises—then one is justified in believing that ψ. This principle is prima facie compelling; it seems to capture the sense in which competent deduction is an epistemically secure means to extend belief. However, even the single-premise version of (...)
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  4.  23
    Fatalism and the Logic of Unconditionals.Justin Bledin - forthcoming - Noûs.
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  5.  59
    Rigid and Flexible Quantification in Plural Predicate Logic.Lucas Champollion, Justin Bledin & Haoze Li - forthcoming - Semantics and Linguistic Theory 27.
    Noun phrases with overt determiners, such as <i>some apples</i> or <i>a quantity of milk</i>, differ from bare noun phrases like <i>apples</i> or <i>milk</i> in their contribution to aspectual composition. While this has been attributed to syntactic or algebraic properties of these noun phrases, such accounts have explanatory shortcomings. We suggest instead that the relevant property that distinguishes between the two classes of noun phrases derives from two modes of existential quantification, one of which holds the values of a variable fixed (...)
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  6.  57
    Research Programs, Model-Building and Actor-Network-Theory: Reassessing the Case of the Leontief Paradox.Justin Bledin & Sharon Shewmake - 2004 - Journal of Economic Methodology 11 (4):455-476.
    Methodology of scientific research programs (MSRP), model-building and actor-network-theory (ANT) are woven together to provide a layered study of the Leontief paradox. Neil De Marchi's Lakatosian account examined the paradox within an Ohlin-Samuelson research program. A model-building approach rather highlights the ability of Leontief's input-output model to mediate between international trade theory and the world by facilitating an empirical application of the Heckscher-Ohlin Theorem. The epistemological implications of this model-building approach provide an alternative explanation of why Samuelson and other prominent (...)
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  7.  11
    Challenging Epistemology: Interactive Proofs and Zero Knowledge.Justin Bledin - 2008 - Journal of Applied Logic 6 (4):490-501.
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