Pay attention and maybe you'll get to understand this. See my post 747. Do you you understand what I said, and do you agree with it?
Post 747 states that the second has a definition. The meter also has a definition. This is correct, they do.
So does the mile. So does the hour. The speed of light really is 670 616 629 mph. I can explain that number using cesium atoms and length-standards if you like, but it's irrelevant.
Go ahead and show me how you plug 670,616,629 into an equation that yields the proton/electron mass ratio.
