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实质非蕴涵是对实质蕴涵的否定。即是说:对于任何两个命题P和Q,当且仅当非P实质蕴涵Q,P实质非蕴涵Q。用更显明的话语来解释就是:由P到Q的实质非蕴涵仅在P为真,Q为假时成立。

文氏图

逻辑学符号可以如此表示实质非蕴涵:

p⊅q
Lpq
p↛q

实质非蕴涵等同于:

p∧~q

定义

真值表

更多信息 ...
p q
T T F
T F T
F T F
F F F
关闭

语用

“P但不是Q”

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