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    A definition that permits infinite spatial spread conflat... — Carmelics
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    Challenges→The label 'time machine' should not be restricted to devices operating within a finite spatial range, because adopting a more liberal stance avoids various complications while still sufficing to elicit key points about time machines.

    A definition that permits infinite spatial spread conflates time machines with global spacetime topology changes, obscuring the causal agency of a localized device.

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    1 reason for
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    Reasons For

    1 perspective
    Reason for
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    • 1.Causal efficacy requires identifying the localized agent responsible; infinite spatial effects obscure which component does the work.
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    • 2.Time machines and topology changes are mechanically distinct; conflating them prevents precise physics and muddies engineering intent.
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    • 3.A definition allowing infinite spread is unfalsifiable; no experiment could distinguish the device's actual causal power from background effects.
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    Reasons Against

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    Reason against
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    • 1.General relativity permits localized devices to produce global spacetime effects; restricting definitions to finite spread is physically arbitrary.
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    • 2.Distinguishing 'time machine' from 'topology change' may be conceptually useful but not ontologically fundamental to causal explanation.
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    • 3.Infinite-spread definitions can still identify causal agency through field equations; spatial extent doesn't erase localized sources.
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    Causation1 linkedModality & Possibility1 linked

    Related

    A definition allowing infinite spread is unfalsifiable; no experiment could dist...Causal efficacy requires identifying the localized agent responsible; infinite s...Distinguishing 'time machine' from 'topology change' may be conceptually useful ...General relativity permits localized devices to produce global spacetime effects...
    +3 moreShow less
    Infinite-spread definitions can still identify causal agency through field equat...The label 'time machine' should not be restricted to devices operating within a ...Time machines and topology changes are mechanically distinct; conflating them pr...

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    2 (1 for, 1 against)
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