Making Sense of Deduction

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An argument is deductive when the arguer believes the truth of the premises necessitates the truth of the conclusion. A deductive argument is valid when the arguer’s claim is true, i.e., when there are no possible worlds whether the premises are true and the conclusion is false. But in order to evaluate this claim in an accurate manner we need to consider three qualifications that have been repeatedly ignored in the literature, namely, consistency in the attribution of truth values, world consistency, and the inclusion of the reasons offered by the arguer in support of the premises. These apparently innocuous restrictions have significant and far-reaching implications.
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First archival date: 2020-08-10
Latest version: 12 (2021-01-06)
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