这样我们就有了绝对可靠的迹象，唯一构成完全论据的那种，因为只有这种迹象在陈述为真时不会被驳倒。

Here we have the infallible kind of Sign, the only kind that constitutes a complete proof, since it is the only kind that, if the particular statement is true, is irrefutable.

youdao

该论述同样是可以驳倒的，即使呼吸很快这一陈述为真，因为人没有发烧也会呼吸困难。

This argument also is refutable, even if the statement about the fast breathing be true, since a man may breathe hard without having a fever.

youdao

在1987年8月，他对警方声称，他实施了另外5起谋杀，并且甚至说出他埋藏尸体的地点，但是警方未能证实这些陈述是否为真。

In August 1987 he claimed to police that he had carried out another five killings and even said where he had buried the bodies, but the police were never able to prove whether these claims were true.

youdao