No, that's not the part we disagree about. Yes, I know, Avogadro's number is a fixed constant now. It's not a _fundamental constant_: https://en.wikipedia.org/

No, that's not the part we disagree about. Yes, I know, Avogadro's number is a fixed constant now. It's not a _fundamental constant_: https://en.wikipedia.org/wiki/Fundamental_constant https://en.wikipedia.org/wiki/Fundamental_constant A fundamental constant isn't just any fixed constant. It's specifically a constant that describes a fundamental property of the universe. For instance, c describes the speed of light in a vacuum, and is a fundamental physical property of the universe. Avogadro's constant isn't the same thing. It's just a number that humans decided would be useful. We could have fixed it to any other number; there's nothing fundamental about the number ~6.022e23.