Mastery is substantially about figuring out what rules of thumb and aphorisms are in place to keep beginners and idiots from hurting themselves or each other, and which ones are universal (including some about not hurting yourself, eg gun safety, sharps safety, nuclear safety).
Mastery is substantially about figuring out what rules of thumb and aphorisms are in place to keep beginners and idiots from hurting themselves or each other, and which ones are universal (including some about not hurting yourself, eg gun safety, sharps safety, nuclear safety).