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    Carmelics

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    LoyalLoyalJusticeJustice
    Made withinDC&Austin
    Statements
    321,452
    Perspectives
    108,905
    Topics
    42
    Home/Original/inverse
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    Inverse View

    It is not the case that A time index in propositions is unnecessary

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    Reasons For

    2 perspectives
    Reason for 1 of 2
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    • 1.Propositions must have stable, eternal truth values to function as the objects of propositional attitudes and logical inference.
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    • 2.A tensed sentence like 'It is raining' expresses different propositions at different times only if propositions themselves carry temporal indices.
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    • 3.Quantification over times in logical form does not eliminate the need for a time parameter in the proposition's truth conditions.
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    Reason for 2 of 2
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    • 1.Kaplan's framework demonstrates that sentences have both a character and a content, where content is evaluated relative to a circumstance of evaluation including a time index.
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    • 2.If the time of evaluation were absorbed into logical form via quantifiers, context-sensitive temporal expressions like 'now' and 'then' would lose their semantic anchoring to the context of utterance.
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    • 3.The distinction between the time of utterance and the time of evaluation, which operators and indices track, cannot be replicated by unrestricted quantification over times.
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    Reasons Against

    1 perspective
    Reason against
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    • 1.Tenses are best modeled in terms of quantification over times rather than tense operators
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    • 2.If tenses are modeled via quantification over times, a time index on propositions serves no additional role
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