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    Logical validity requires that if all premises of an argu... — Carmelics
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    Supports→A position on a dialectical structure is consistent if and only if contradictory sentences are assigned opposite truth values and every argument whose premises are all true has a true conclusion

    Logical validity requires that if all premises of an argument are true, the conclusion must be true

    Philosophy of LanguageTruth & Knowledge
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    Philosophy of LanguageTruth & Knowledge

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    A position on a dialectical structure is consistent if and only if contradictory...Contradictory sentences must receive opposite truth value assignments for a posi...

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    An argument is valid if its conclusion comes out true under every inte...90%Logical validity requires that premises be relevant to the conclusion ...90%An argument is valid in a model only when in any point at which the pr...86%An argument is formally valid if and only if the premises cannot be tr...86%

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    With gestures toward earlier work by Phan Minh Dung (1995), Gregor Betz constructs a model of belief change based on “dialectical structures” of linked arguments (Betz 2013). Sentences and their negations are represented as digits positive and negative, arguments as ordered sets of sentences, and two forms of links between arguments: an attack relation in which a conclusion of one argument contradicts a premise of another and support relations in which the conclusion of one argument is equivalen

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