A proposition derived by negating and permuting the terms of another, equivalent proposition; for example, All not-Y is not-X is the contrapositive of All X is Y.
质位变换命题
和置换另一等价命题的项而得到的命题；例
，“所有的非Y是非X”是“所有的X是Y”的质位变换命题
正
A proposition derived by negating and permuting the terms of another, equivalent proposition; for example, All not-Y is not-X is the contrapositive of All X is Y.
质位变换命题和置换另一等价命题的项而得到的命题；例，“所有的非Y是非X”是“所有的X是Y”的质位变换命题正
声明：以上例句、词性分类均
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正。
