tailcalled
The global knowledge game; attempts to get at the deeper, more universal truths
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- Jul 9, 2026
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What is the computational substance of the axiom of choice? (opens the original)
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I feel like online discussions of the axiom of choice either get impenetrably technical, or uselessly vague. Through realizability semantics, I’ve gotten an intuition for the axiom of choice that I want to share in elementary terms (without getting all the way into the effective topos). I will take a somewhat eccentric approach to it, showing the everyday utility of the axiom of choice, as well as the implications from a constructive rather than a classical point of view.Thanks for reading! Sub
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