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See for yourself (Wolfram|Alpha, not Wolfram Language!): [https://www.wolframalpha.com/input/?i=0%2F(0%2F0)][1] [1]: https://www.wolframalpha.com/input/?i=0/%280/0%29
From the Wolfram Blog ([*Computing Exact Uncertainties—Physical Constants in the Current and in the New SI*][1]): > The arithmetic model of [`Around`][2]`[]` follows the [GUM][3] (Guide to the Expression of Uncertainty in Measurement)—not to be...