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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 The proposition 'Every German philosopher is European' is universally valid with respect to the idea [philosopher]

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    Reasons For

    2 perspectives
    Reason for 1 of 2
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    • 1.Universal validity requires substitution to preserve logical form, but 'philosopher' is not a purely logical idea in Bolzano's own framework.
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    • 2.If 'philosopher' carries substantive content, its substitution may alter the proposition's truth-conditions rather than merely its extension.
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    • 3.Therefore, variation with respect to 'philosopher' tests empirical co-extension, not logical validity in Bolzano's intended sense.
      ?

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    Reason for 2 of 2
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    • 1.Quine's critique of analyticity shows that no non-trivial universal generalization is insulated from empirical revision by meaning alone.
      ?

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    • 2.The claim that all substitutions for 'philosopher' preserve truth assumes a stable, meaning-fixed extension immune to such revision.
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    • 3.A non-European thinker meeting all criteria for 'German philosopher' would falsify the proposition, making it empirically contingent rather than universally valid.
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    Reasons Against

    1 perspective
    Reason against
    ?
    • 1.Every German is European
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    • 2.A proposition is universally valid with respect to a sequence of ideas if it holds for all substitutions of those ideas
      ?

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