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问 题 问题 36 命题S为“若 p则 q” ,对于S的否定、否命题和┐S ,有下列观点 :观点 1 S的否定为“若 p则┐q” .观点 2 S的否定为“若┐p则q” .观点 3 S的否定为“若┐p则┐q” ,即它与S的否命题是一回事 .观点 4 ┐S为“若 p则┐q” .按照观点 4的说法 ,若S为“
Question 36 The proposition S is “if p is q”. For the negative of S, the no proposition and ┐S, there are the following points: The negation of viewpoint 1 S is “if p is ┐ q”. The negation of viewpoint 2 S is “if ┐p is q”. The negation of viewpoint 3 S is “If ┐ p is ┐ q”, that is, it is the same thing as S’s no proposition. Opinion 4 ┐S is “If p is ┐ q”. According to point of view 4 Saying, if S is ”