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And to address the argument on precision versus descending. I disagree. An instrument counting seconds is more precise than a machine counting minutes, hours, days, weeks, months etc... And that holds true through the chain. The precision is in the unit.
the unit is just a report of orientation, not magnitude. if you have a digital counter you are limited by the precision of the digital counter, not the units chosen. an analog measurement however is limited instead by other uncertanties. precision has, genuinely, no direct relationship to units. precision is a statistical concept, not a dimensional one.