这是真理的价值，或真或假。

So that's the value of its truth that it's either true or false.

youdao

论点可能有效或者无效，但是不能或真或假。

An argument can be either valid or invalid but not true or false.

youdao

这或真或假。

This could be true and this false.

youdao

There is no such thing as true or false.

也就没有真或假。

哈佛公开课 - 计算机科学课程节选

But the point to think about for next time is just, is it really true that all three of the premises are true, or might one or more of them be false?

但下次要思考的关键是,那三个前提是否的确全部为真,或许一个或几个为假呢

耶鲁公开课 - 死亡课程节选