what does mean would not hold water?

[Lilo]

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #408 "Water Idioms", question 2

He was told that the new plan he'd developed just wouldn't hold water -- means: ..........

(a) woulnd't float
(b) wouldn't work
(c) wouldn't swim
(d) wouldn't sink

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #408 "Water Idioms", answer 2

He was told that the new plan he'd developed just wouldn't hold water -- means: wouldn't work.

Correct answer: (b) wouldn't work
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what does mean would not hold water?

Lilo

[Alan]

Hi,

If a scheme, idea, plan or whatever is described as 'not holding water' it suggests that it has so many weaknesses or flaws that it cannot be practical. The idea comes from the image of a container with a hole in it. As you pour the water into it, so the water comes out through the hole.

Alan
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