The whole argument rests on a false assumption.

整个论证都是基于一个错误的假设。

《牛津词典》

His actions were based on a false assumption.

他的行为基于错误的设想。

《牛津词典》

This is a false assumption.

这是一个错误的假设。

youdao

This argument rests on a false assumption, that the Middle East was stable to begin with.

NPR: Bush, Ahmadinejad Air Competing Views at U.N.

The game itself turned on a false assumption, suggesting a deeper fault in the system.

FORBES: The Case Of The Art Forger Who Restored Dead Painters' Careers [Book Excerpt]

Past efforts to cut hospital queues have been based on the false assumption that they are a simple backlog, and that increasing the rate of treatments will eventually clear the backlog.

ECONOMIST: Waiting for Dobbo