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    Requiring past-endless null geodesics to meet Σ₀ imposes ... — Carmelics
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    Supports→The requirement that causal curves with a future endpoint in the time travel region and no past endpoint must intersect Σ₀ is too strong, because it rules out Thornian time machines altogether.

    Requiring past-endless null geodesics to meet Σ₀ imposes a Cauchy-development standard that Morris and Thorne's construction never claimed to satisfy, targeting a straw man.

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    Causation1 linkedModality & Possibility1 linked

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    The requirement that causal curves with a future endpoint in the time travel reg...

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