A new definition of the measurement uncertainty (MU) was proposed by Working Group 1 Joint Committee for Guides in Metrology, JCGM-WG1. This avoids any quantitative aspect and focuses on its subjective nature.
 The reads as follows:
 doubt about true value measurand that remains after making a measurement.
 Here, MU is no longer quantitative; it rather (subjective) state mind. co...