This might be a question to ask in a Chemistry site, but because there is a lot of talk about redefining many units of measurements in terms of Avogadro's Number / the Mole, I was wondering why we don't just redefine the Mole to infinite precision, since it is basically inherently an integer.
This might be the only unit/physical constant that can be defined to infinite precision. The only unit that is an "integer".
I guess it's not really a physical constant, per se, in that it is not a property of nature. But then we can easily create a definition of the Kilogram that doesn't change over time as exactly something-something moles worth of Carbon-12.