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    Carmelics

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    Made withinDC&Austin
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    Home/Original/inverse
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    Inverse View

    It is not the case that Extracting a notion of time from the canonical formulation of general relativity constitutes a classical problem of time.

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    Reasons For

    2 perspectives
    Reason for 1 of 2
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    • 1.Karel Kuchař distinguishes multiple inequivalent definitions of time in canonical GR, none of which reduces to a single classical problem.
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    • 2.Because the 'problem of time' fractures into at least eight distinct technical problems (Kuchař 1992), characterizing it as one classical problem misrepresents its logical structure.
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    • 3.A claim that conflates multiple formally distinct problems cannot be assessed as true or false without first resolving which sub-problem is intended.
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    Reason for 2 of 2
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    • 1.Julian Barbour and others argue that time is not extracted from GR but is rather eliminated entirely, making 'extraction' a category error.
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    • 2.If timelessness is the fundamental ontological upshot of canonical GR, then the 'problem of time' is not classical but reflects a genuine absence of time at the quantum level.
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    Reasons Against

    1 perspective
    Reason against
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    • 1.To extract a notion of time from the canonical formulation, one must first solve for the spacetime metric and then single out a specific solution.
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    • 2.The spacetime geometry is itself a dynamical variable in general relativity.
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    • 3.Because spacetime geometry is a dynamical variable, time must also be solved for rather than being given in advance.
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