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    Lewis's possible worlds semantics selects counterfactual ... — Carmelics
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    Supports→Counterfactuals cannot adequately capture the concept of circumstantial luck

    Lewis's possible worlds semantics selects counterfactual worlds by similarity metrics that presuppose a stable agent-type, but circumstantial luck is precisely what destabilizes that type across worlds.

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    Key Terms

    Agent-type(as the identity being questioned across different scenarios)
    A category describing what kind of person or actor someone is, based on their stable characteristics, choices, or nature.
    Lewis(philosopher who created the similarity metric being discussed)
    David Lewis was a famous American philosopher who developed influential theories about possible worlds—alternative ways reality could have been.
    Similarity metrics(as used in logic and mathematics)
    Methods or formulas for measuring how much alike two things are to each other.
    circumstantial luck(Identified as one of the types into which causal luck may be exhausted)
    Luck in the situations and circumstances one faces, which affects what moral choices are available and thus affects moral responsibility
    counterfactual

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    (Modal logic and epistemology)
    A conditional statement concerning what would be the case if some antecedent condition were true, evaluated across possible worlds; contraposition does not hold in general for counterfactuals.
    possible worlds semantics(Philosophy of language)
    A propositionalist approach that identifies propositions with sets of possible worlds.

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    Moral Responsibility1 linked

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    Counterfactuals cannot adequately capture the concept of circumstantial luck

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