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    Home/Original/inverse
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    Inverse View

    It is not the case that Moore's proof is non-transmissive because Q8 (the proposition that an external world exists) is part of the collateral information a subject needs independent justification for in order to receive justification for perceptual hypotheses from perceptual evidence.

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    Reasons For

    2 perspectives
    Reason for 1 of 2
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    • 1.Perceptual justification is foundational and does not require prior independent justification for background enabling conditions like Q8.
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    • 2.Wittgenstein's 'On Certainty' shows that hinges like Q8 function as rules of evidence rather than propositions requiring prior justification, so they cannot constitute collateral information in Wright's sense.
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    • 3.If Q8 were genuinely required collateral information, no perceptual belief could ever be justified, generating a regress Wright's own framework is not equipped to block.
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    Reason for 2 of 2
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    • 1.Pryor's dogmatist account holds that having a perceptual experience with content p gives immediate, non-inferential prima facie justification for p independent of any antecedent justification for the external world.
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    • 2.If Pryor's dogmatism is coherent, then Q8 is not collateral information but rather a consequence derivable from perceptual justification, making Moore's proof transmissive after all.
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    • 3.Wright conflates the epistemic priority of Q8 in skeptical dialectic with a constitutive role in the structure of perceptual justification, which are distinct claims requiring separate argument.
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    Reasons Against

    1 perspective
    Reason against
    ?
    • 1.Q8 is a cornerstone for the area of discourse about perceivable things.
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    • 2.A cornerstone c for an area of discourse d is such that no proposition p in d could be justified for a subject s if s had no independent justification for c.
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    • 3.Moore's proof treats Q8 conservatively with respect to any perceptual hypothesis p: if a subject had no independent justification for Q8, no apparent perceptual experience could supply prima facie justification for any perceptual hypothesis p.
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