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A COUNTEREXAMPLE TO MODUS PONENS* T HE rule of modus ponens, which tells us that from an indicative conditional rlf cjJ then 1/1 l, 1 together with its antecedent cjJ, one can infer 1/1, is one of the fundamental principles of logic. 2 Yet, as the following examples show, it is not strictly valid; there are occasions on which one has good grounds for believing the premises of an application of ...
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ژورنال
عنوان ژورنال: The British Journal for the Philosophy of Science
سال: 2018
ISSN: 0007-0882,1464-3537
DOI: 10.1093/bjps/axw015