The metric revolution created the saying "measure twice, cut once".

A metre is supposed to represent a 10millionth of the distance from the pole to the equator, a metre falls short by .2mm of this. They should have "measured it twice, cut once"
The current definition of a metre is the distance light travels in 1/299,792,458 of a second in a vacuum. So much for replacing fractions with decimals
Now the length of a metre is totally dependant on the duration of time