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    The appearance of contradiction in relative identity case... — Carmelics
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    Challenges→Relative identity is logically untenable because it entails a contradiction under Leibniz's Law.

    The appearance of contradiction in relative identity cases thus reflects equivocation in the application of predicates across sortals, not a genuine violation of substitutivity.

    ?Rate how convincing each reason is below to see the overall strength.
    1 reason for
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    Reasons For

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    Reason for
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    • 1.Sortals like 'statue' and 'clay' classify objects by different persistence conditions, so 'same' means different things under each.
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    • 2.The puzzle (same object, different identity across sortals) dissolves if we recognize predicates implicitly carry their sortal context.
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    • 3.Logic's substitutivity principle applies only within consistent identity criteria, not across fundamentally different classification schemes.
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    Reasons Against

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    Reason against
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    • 1.If identity itself is genuinely relative, then 'equivocation' merely relabels the problem rather than solving it.
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    • 2.Sortal-indexed identity (A=B as statue, A≠B as clay) seems to violate the transitivity of identity, a logical bedrock principle.
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    • 3.Claiming predicates change meaning across sortals requires independent evidence, not just post-hoc rescue of contradictions.
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    Related

    Claiming predicates change meaning across sortals requires independent evidence,...If identity itself is genuinely relative, then 'equivocation' merely relabels th...Logic's substitutivity principle applies only within consistent identity criteri...Relative identity is logically untenable because it entails a contradiction unde...
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    Sortal-indexed identity (A=B as statue, A≠B as clay) seems to violate the transi...Sortals like 'statue' and 'clay' classify objects by different persistence condi...The puzzle (same object, different identity across sortals) dissolves if we reco...

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