unassailable

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It is only by doing so that we can reach an unassailable consensus about the sun's true level of influence on the Earth and its climate.
但要做到這個，我們必須要對太陽真實水平以及其地球和氣候影響得到一個無懈可擊的共識。
It needed the most obvious and unassailable evidence to be presented before them before they were reluctantly forced to postulate a new particle.
我們要將最明顯而又無懈可擊的証據擺在他們眼前，否則他們也衹是勉強被迫地接受這種新粒子。
The Social Democrats themselves took 30.9% of the vote, meaning that this once-unassailable political force just managed to cling on to its position as Sweden's largest party.
社會民主黨贏得了30.9%的選票，這意味著這個曾經無懈可擊的政黨如今也成功的維持了他作爲瑞典最大政黨的地位。

And given how large that permanent war chest is, he can target companies previously thought unassailable.
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Instead, they should simply acknowledge that people with integrity, people with unassailable good character, exist.
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In so doing he proved that he is a man of unassailable integrity and stellar character.
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If you describe something or someone as unassailable, you mean that nothing can alter, destroy, or challenge them.