If it does not hold water, then it is weak and not worth debating.

如果它没能hold water，那它就是不可靠且无法证明的。

youdao

"Be happy forever", is a hope not only so slim that it could never come true, but also so ridiculous that it does not hold water at all.

“永远快乐”这句话，不但渺茫得不能实现，并且荒谬得不能成立。

youdao

There is a grain of truth in these statements, but they ignore a more important fact. 3) Some people say …, but it does not hold water. …

在这些陈述中有一丝真理，但是这些陈述忽视了一个更重要的事实…

youdao

If it does not hold water, then it is weak and cannot be proved.

VOA: special.2009.05.10

How credible is the IPCC?. The old 2000 scientists cannot be wrong argument also does not hold water(it is actually 2500).

BBC: Is Cameron still keen to be green?

Where there is less sand they, like Mr Serrato, can mix it into the soil, but the mixture does not hold water so well.

ECONOMIST: Honduras and Nicaragua