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I don’t see the fail here. The comma used after the 4 (in place of a decimal point) is common for European countries. The digits given are correct for this approximation of the square root of 21.

I don’t really see the FAIL here.

It’s a reference to the planned reconstruction of the train station in the german town of Stuttgart.

The project is called “Stuttgart 21” and it’s very contoversial, even leading to riots – some might consider it “evil” or even as “all evil”.

Then you just type sqrt(21) in your calculator and see what the headline and the image want to say.

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I just plain don’t understand ❓

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I don’t see the fail here. The comma used after the 4 (in place of a decimal point) is common for European countries. The digits given are correct for this approximation of the square root of 21.

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