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    The inference from 'well-founded sets inherit well-ordera... — Carmelics
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    Challenges→The restricted principle that all well-founded sets are well-orderable is consistent with this theory

    The inference from 'well-founded sets inherit well-orderability in Choice-models' to 'the restricted principle is consistent' conflates semantic truth-in-a-model with syntactic consistency.

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    Key Terms

    Axiom of Choice(Foundations of mathematics; arises in second-order logic as the statement that every total binary relation has a choice function)
    Given a set A of non-empty pairwise disjoint sets, there exists a set B containing exactly one element from each set in A. When A is infinite, forming B requires making infinitely many simultaneous choices.
    Choice-models(mathematical logic and set theory)
    Hypothetical mathematical scenarios that assume the Axiom of Choice (a rule saying you can always pick one item from any collection, even infinite ones).
    Conflates(in argumentation and logic)
    Treats two different things as if they're the same thing, or mixes them up in a way that causes confusion.
    Restricted principle(logic and mathematics)
    A limited or narrowed version of a broader rule or assumption.

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    Semantic truth-in-a-model(logic and philosophy of language)
    Whether a statement is true when you actually imagine a specific scenario or world and check what's actually happening there.
    Syntactic consistency(logic)
    Whether a set of rules or statements follows all the formal grammatical and logical rules, without contradicting the structure of the system itself.
    Well-orderability(as a mathematical property)
    The ability to arrange all elements of a collection in a sequence where every subset has a smallest element, like organizing items from least to greatest.
    consistent(Contrasted with the model-theoretic notion of satisfiability)
    A proof-theoretic notion indicating that no contradiction is derivable from a set of sentences
    well-founded sets
    Sets for which every non-empty subset has a minimal element under membership, i.e., sets that do not contain infinite descending membership chains

    Connections

    2 topics

    Truth & Knowledge1 linkedModality & Possibility1 linked

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    The restricted principle that all well-founded sets are well-orderable is consis...

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