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Justin Khoo
Massachusetts Institute of Technology
  1.  45
    New Horizons for a Theory of Epistemic Modals.Justin Khoo & Jonathan Phillips - forthcoming - Australasian Journal of Philosophy:1-16.
    Recent debate over the semantics and pragmatics of epistemic modals has focused on intuitions about cross-contextual truth-value assessments. In this paper, we advocate for a different approach to evaluating theories of epistemic modals. Our strategy focuses on judgments of the incompatibility of two different epistemic possibility claims, or two different truth value assessments of a single epistemic possibility claim. We subject the predictions of existing theories to empirical scrutiny, and argue that existing contextualist and relativist theories are unable to account (...)
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  2.  60
    Quasi Indexicals.Justin Khoo - forthcoming - Philosophy and Phenomenological Research.
    I argue that not all context dependent expressions are alike. Pure (or ordinary) indexicals behave more or less as Kaplan thought. But quasi indexicals behave in some ways like indexicals and in other ways not like indexicals. A quasi indexical sentence φ allows for cases in which one party utters φ and the other its negation, and neither party’s claim has to be false. In this sense, quasi indexicals are like pure indexicals (think: “I am a doctor”/“I am not a (...)
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  3.  42
    Triviality Results and the Relationship Between Logical and Natural Languages.Justin Khoo & Matthew Mandelkern - forthcoming - Mind:fzy006.
    Inquiry into the meaning of logical terms in natural language (‘and’, ‘or’, ‘not’, ‘if’) has generally proceeded along two dimensions. On the one hand, semantic theories aim to predict native speaker intuitions about the natural language sentences involving those logical terms. On the other hand, logical theories explore the formal properties of the translations of those terms into formal languages. Sometimes, these two lines of inquiry appear to be in tension: for instance, our best logical investigation into conditional connectives may (...)
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  4.  25
    Disjunctive Antecedent Conditionals.Justin Khoo - forthcoming - Synthese.
    Disjunctive antecedent conditionals (DACs)—conditionals of the form if A or B, C—sometimes seem to entail both of their simplifications (if A, C; if B, C) and sometimes seem not to. I argue that this behavior reveals a genuine am- biguity in DACs. Along the way, I discuss a new observation about the role of focal stress in distinguishing the two interpretations of DACs. I propose a new theory, according to which the surface form of a DAC underdetermines its logical form: (...)
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  5. Modal Disagreements.Justin Khoo - 2015 - Inquiry : An Interdisciplinary Journal of Philosophy 58 (5):511-534.
    It is often assumed that when one party felicitously rejects an assertion made by an- other party, the first party thinks that the proposition asserted by the second is false. This assumption underlies various disagreement arguments used to challenge contex- tualism about some class of expressions. As such, many contextualists have resisted these arguments on the grounds that the disagreements in question may not be over the proposition literally asserted. The result appears to be a dialectical stalemate, with no independent (...)
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  6. Moral Disagreement and Moral Semantics.Justin Khoo & Joshua Knobe - 2016 - Noûs:109-143.
    When speakers utter conflicting moral sentences, it seems clear that they disagree. It has often been suggested that the fact that the speakers disagree gives us evidence for a claim about the semantics of the sentences they are uttering. Specifically, it has been suggested that the existence of the disagreement gives us reason to infer that there must be an incompatibility between the contents of these sentences. This inference then plays a key role in a now-standard argument against certain theories (...)
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  7. Conditionals, Indeterminacy, and Triviality.Justin Khoo - 2013 - Philosophical Perspectives 27 (1):260-287.
    This paper discusses and relates two puzzles for indicative conditionals: a puzzle about indeterminacy and a puzzle about triviality. Both puzzles arise because of Ramsey's Observation, which states that the probability of a conditional is equal to the conditional probability of its consequent given its antecedent. The puzzle of indeterminacy is the problem of reconciling this fact about conditionals with the fact that they seem to lack truth values at worlds where their antecedents are false. The puzzle of triviality is (...)
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