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    Made withinDC&Austin
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    Home/Original/inverse
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    Inverse View

    It is not the case that If the domains of worlds vary, a B-preserving isomorphism can exist between worlds that differ in which A-properties are instantiated, undermining P3's identification of the two conditions.

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    Reasons For

    1 perspective
    Reason for
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    • 1.A-properties typically constitute what entities are fundamental to a world; changing which A-properties are instantiated changes world identity itself, not just isomorphism conditions.
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    • 2.B-preserving isomorphisms between distinct domains require a background identity criterion independent of both A and B, creating explanatory regress rather than solving it.
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    • 3.P3's identification is meant to show when worlds are genuinely identical; structural similarity without A-property identity leaves the core identity question unanswered.
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    Reasons Against

    1 perspective
    Reason against
    ?
    • 1.Domain variance allows structurally identical worlds to differ in which entities exist, making B-preserving isomorphisms possible despite A-property differences.
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    • 2.P3 conflates structural identity (B-preservation) with metaphysical identity (A-property instantiation), but these are distinct conditions requiring separate evaluation.
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    • 3.If B-properties supervene on structural relations alone, then worlds with identical structures but different domains can share all B-properties while differing in A-properties.
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