|
In logic, modus non excipiens〔Bart Verheij, ’Logic, Context and Valid Inference Or: Can There be a Logic of Law’, 2000. Available on bart.verheij@metajur.unimaas.nl, ()〕〔Walton, Douglas; ''Are Some Modus Ponens Arguments Deductively Invalid?'', University of Winnipeg〕 is a valid rule of inference that is closely related to modus ponens. This argument form was created by Bart Verheij to address certain arguments which are types of ''modus ponens'' arguments, but must be considered to be invalid. An instance of a particular ''modus ponens'' type argument is :A large majority accept A as true. Therefore, there exists a presumption in favor of A. However, this is an ''argumentum ad populum'', and is not deductively valid. The problem can be addressed by drawing a distinction between two types of inference identified by Verheij: ''Modus ponens'': :Premises: : *As a rule, if P then Q : *P :Conclusion: : *Q and ''Modus non excipiens'' :Premises: : *As a rule, if P then Q : *P : *It is not the case that there is an exception to the rule that if P then Q :Conclusion: : *Q 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Modus non excipiens」の詳細全文を読む スポンサード リンク
|