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    Rule (5) permits substitution instances where the positiv... — Carmelics
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    Supports→The proposed analogical inference rule (5) is unacceptable as a general rule.

    Rule (5) permits substitution instances where the positive analogy consists entirely of formally shared but materially irrelevant properties, as Achinstein's swan-segment case demonstrates.

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    Key Terms

    Achinstein(the subject of the logical argument being discussed)
    A philosopher who studied how we reason by comparing different things; he's referenced here for a specific example he created about swans and line segments.
    Formally shared(in comparing logical structures)
    Having the same structure or logical pattern, even if the actual content or meaning is different.
    Materially irrelevant(in evaluating whether something matters for an argument)
    Details or properties that don't actually matter to the main point or conclusion you're trying to make.
    Rule (5)(a criterion that the analogy succeeds in meeting)
    A specific criterion or standard (the fifth one in whatever list is being discussed) that the analogy is being tested against to see if it's logically valid.
    Swan-segment case

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    (as a specific philosophical example)
    A famous thought experiment or example created by Achinstein to show how analogies can be misleading when they share structure but not meaningful content.
    positive analogy(Analogical reasoning structure)
    The shared properties P(S) and P(T) that hold in both the source domain S and the target domain T, forming the basis of an analogical argument
    substitution instances(as used in logic)
    The different specific examples you get when you plug in different words or values into a general logical pattern.

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    2 topics

    Truth & Knowledge1 linkedPhilosophy of Language1 linked

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    The proposed analogical inference rule (5) is unacceptable as a general rule.

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