Measurement uncertainty and its connection with true value in the GUM versus JCGM documents

•Revision of GUM must preserve essential GUM (excluding Annex G)•Measurement is assigning a result of measurement to describe a measurand.•JCGM documents have undermined GUM view of uncertainty.•JCGM coverage interval does not apply to an ordinary measurand. This paper discusses the concept of uncer...

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