The proponents of Cruz is NBC rely on framing the argument. NBC isn't defined in the constitution is one of the tools. Another is to work in a dichotomy of "either naturalized (by a naturalization process) or natural born, there is no other category named in the constitution."
My post 115 addresses the dichotomy by separating NBC as a tighter qualifier and not a separate category of citizen. A little restructuring of the grammar makes this clear.
Check it out.
-PJ