It is evident as a matter of logic that, since they disagree, not more than one of them can be true.

It is evident as a matter of logic that, since they disagree, not more than one of them can be true.

从逻辑上看，很明显，既然他们意见不一致，其中不可能有一个以上是正确的。

-- Bertrand Russell 罗素