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    Weyl himself acknowledged that conformal plus projective ... — Carmelics
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    Challenges→An additional structure beyond the conformal structure is required in order to determine a unique symmetric linear connection from the equivalence class of conformally equivalent symmetric linear connections.

    Weyl himself acknowledged that conformal plus projective data jointly determine a unique symmetric connection, suggesting the conformal structure is not as underdetermining as the claim implies.

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    Key Terms

    Conformal(in geometry and mathematical physics)
    A mathematical property that preserves angles but not necessarily distances—think of how a map projection can keep angles correct while stretching some regions larger than others.
    Projective(in geometry)
    A type of geometry that focuses on properties that don't change when you look at something from different viewpoints, like how perspective drawing works.
    Symmetric connection(in differential geometry)
    A mathematical tool that describes how to measure curvature and distance in a space in a balanced, symmetric way.
    Underdetermining(in logic and mathematics)
    When information doesn't fully specify or pin down a unique answer—there are multiple possible interpretations consistent with the given data.
    Weyl

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    (as a historical reference in physics)
    Hermann Weyl (1885-1955) was a German mathematician and physicist who identified a mathematical problem about how to connect measurements made in different reference frames in a consistent way.
    knowledge(Distinguished from mere true belief, which may be the product of indoctrination and need not exercise deliberative capacities.)
    Justified true belief — true belief that has been arrived at through the exercise of deliberative capacities, including comparison of and deliberation among alternatives.

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    Truth & Knowledge1 linkedModality & Possibility1 linked

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    An additional structure beyond the conformal structure is required in order to d...

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