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    Carmelics

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    Inverse View

    It is not the case that Necessarily co-extensive concepts like 'triangular' and 'trilateral' are materially equivalent across all possible worlds yet are paradigmatically treated as distinct concepts in intensional semantics.

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    Reasons For

    1 perspective
    Reason for
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    • 1.If concepts are abstract meanings, metaphysical identity obtains when extensions coincide necessarily—differences are merely psychological or linguistic, not semantic.
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    • 2.Intensional semantics treating co-extensive concepts as distinct conflates concepts with modes of presentation or cognitive routes to the same reference.
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    • 3.The distinction collapses under scrutiny: any competent reasoner can move instantly from one concept to the other via basic geometry, suggesting no real conceptual gap.
      ?

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    Reasons Against

    1 perspective
    Reason against
    ?
    • 1.Cognitive significance differs between 'triangular' and 'trilateral' despite identical extensions, demonstrating concepts are not reducible to their referents.
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    • 2.Intensional contexts like belief ascriptions require distinction: one can understand 'trilateral' without immediately grasping 'triangular', proving conceptual distinctness.
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    • 3.Conceptual identity requires sameness of cognitive content and inferential role, which 'triangular' and 'trilateral' lack despite co-extensionality.
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