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    Wittgenstein's 'On Certainty' shows that hinges like Q8 f... — Carmelics
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    Challenges→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.

    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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    Key Terms

    Collateral information(as used in epistemology)
    Background knowledge or assumptions you need to already accept in order to use other evidence to justify a belief.
    On Certainty(The specific philosophical work being referenced)
    A book Wittgenstein wrote near the end of his life that explores what we can be absolutely sure about and how certainty actually works in real life, rather than just in theory.
    Q8(used as a placeholder for a particular proposition in the logical argument)
    A specific claim or proposition being discussed (the exact content isn't defined here, but Q8 is just a label for some statement the philosopher is analyzing).
    Rules of evidence(as what hinges function as)
    Standards or guidelines that determine what counts as acceptable proof or justification for believing something, rather than being claims that need proof themselves.

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    Wittgenstein
    Ludwig Wittgenstein was an Austrian-British philosopher who fundamentally changed how people think about language and meaning in the 20th century. He argued that many philosophical problems arise from misunderstanding how words actually work in everyday life, rather than from deep metaphysical mysteries. His ideas influenced not just philosophy but also mathematics, logic, and even how people approach psychology and artificial intelligence today.
    Wright
    # Wright "Wright" is most commonly a surname in English-speaking countries, meaning someone who makes or builds things (like a "wheelwright" who makes wheels). The most famous example is the Wright brothers—Orville and Wilbur Wright—American inventors who built and flew the first successful airplane in 1903, fundamentally changing transportation and human history. They matter because their achievement launched the aviation industry and proved that powered, controlled flight was possible.
    hinges(Wittgenstein's epistemology; from On Certainty)
    Fundamental principles so basic that they do not require argumentative support and instead serve as the fixed points on which inquiry and reasoning turn.
    justification(Third condition of the tripartite account of knowledge)
    The condition on a knower's belief that excludes mere luck — the belief must be held in a way that is appropriate or warranted, not merely accidentally correct.

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    Truth & Knowledge1 linkedPerception1 linked

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    Moore's proof is non-transmissive because Q8 (the proposition that an external w...

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