Is that the first edition from 2008, or the "revised and expanded" version from 2016?
Why would common law define the age of a biological process beginning? ...but that appears to be the answer.
My guess is that because puberty was when you legally became an adult, it was easiest to set a age rather then make everyone drop trou. But .
You must spread some Reputation around before giving it to actaeon277 again.
Priceless!
Well, majority can be defined by age without defining puberty.