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    Carmelics

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    LoyalLoyalJusticeJustice
    Made withinDC&Austin
    Statements
    321,452
    Perspectives
    108,905
    Topics
    42
    Home/Original/inverse
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    Inverse View

    It is not the case that Observing evidence of discreteness of space would not suffice to select loop quantum gravity over rival theories

    ?Set your confidence on the premises below to see your aggregate.

    Reasons For

    1 perspective
    Reason for
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    • 1.Many approaches to quantum gravity involve discreteness of space
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    • 2.Shared predictions cannot discriminate between the theories that share them
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    Reasons Against

    2 perspectives
    Reason against 1 of 2
    ?
    • 1.Underdetermination of theory by evidence, as articulated by Duhem and Quine, entails that any single empirical result leaves multiple rival theories intact.
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    • 2.LQG, causal set theory, and spin foam models all predict discrete Planck-scale structure through distinct mathematical mechanisms yet identical observational signatures.
      ?

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    • 3.When empirically equivalent rivals exist, observed evidence cannot serve as a sufficient condition for selecting any one theory over its competitors.
      ?

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    Reason against 2 of 2
    ?
    • 1.Inference to the best explanation requires discriminating virtues such as superior unification or novel predictive success, not merely shared confirmatory instances.
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    • 2.Discreteness of space is a structural feature entailed by LQG's foundational commitments but is equally derivable from rival formalisms without borrowing LQG's specific ontology.
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    • 3.Therefore, confirming discreteness confirms only the disjunction of discrete-space theories, leaving LQG's theoretical identity epistemically unselected.
      ?

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