The Unreliability of Our Rulers

We muse these days, many of us, on the unreliability of our rulers.

But that has been the state of things for quite a while now:

Complimentary small plastic rulers, being imprecise, inaccurate, flimsy and defaced with advertising, draw only a measured amount of respect from metrologists. In 1994, two metrologists took measures to see just how much respect the rulers deserve.

Metrologists are the people who come up with more accurate, more precise ways to measure things….