Undefined truth-values in the square of opposition cannot be used as a simple proposition in hypothetical syllogisms vaguely.
对当关系中的真假不定不能看作是一简单命题用于假言三段论。
Undefined truth-values in the square of opposition cannot be used as a simple proposition in hypothetical syllogisms vaguely.
对当关系中的真假不定不能看作是一简单命题用于假言三段论。
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