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    AC or global well-ordering can be derived from equinumero... — Carmelics
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    Challenges→If class bijections require definable functions, the step from equinumerosity with the ordinals to a global well-ordering presupposes definable choice functions, making the argument question-begging.

    AC or global well-ordering can be derived from equinumerosity arguments without constructing explicit choice functions, using category-theoretic or structural methods.

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