To Modus

نویسنده

  • HAO WANG
چکیده

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 modus ponens but yet one is not justified in accepting the conclusion. Later on, we shall see how these examples can be modified to give counterexamples to Stalnaker's semantics for the conditional:

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تاریخ انتشار 2007