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在第一种情况下,我们称这命题为重言式,在第二种情况下,称这命题为矛盾式。
In the first case we call the proposition a tautology; in the second, a contradiction.
youdao
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在第一种情况下,我们称这命题为重言式,在第二种情况下,称这命题为矛盾式。
In the first case we call the proposition a tautology; in the second, a contradiction.
youdao