Monolingual examples (not verified by PONS Editors)

English
But the acid test of a quality screen, and what sets apart the psychometry of screens from any other type of test, is proof of accuracy.
en.wikipedia.org
He reintroduced the picric acid test for albumen and the picric acid and potash test for sugar.
en.wikipedia.org
The acid test of authentic tailoring standards is the wrinkle that comes from poor tailoring.
en.wikipedia.org
The starting point should always be unbiased information gathering followed by unbiased pattern recognition and then the acid test of seeking counter-information.
en.wikipedia.org
The acid test for any lightbulb, no matter how fancy, is how well it lights a room.
www.theregister.co.uk
Later this friendship was to withstand what everyone agrees to be the acid test of collaboration in writing.
en.wikipedia.org
Generally, the acid test ratio should be 1:1 or higher, however this varies widely by industry.
en.wikipedia.org
Another example is the quick ratio method, nicknamed acid test, used by financial analysts to assess the liquidity of a business.
en.wikipedia.org
Restoration: the acid test for ecology.
en.wikipedia.org

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