Ah ha. Now I see the problem.
There is one path to natural-born citizenship that mostly definitely is settled law: those born in the country to citizen parents. All other paths have unresolved doubts and are absolutely up for debate until the SCOTUS makes a ruling.
I think most everyone agrees that an NBC is definitely someone born on the soil to two American citizens.
Everything else is up in the air- not settled law-INCLUDING the idea that there is only ONE definition.
There may be more than one definition. There may not be.
But the oral argument in Nguyen shows that it is up for debate and NOT SETTLED LAW.
“There is one path to natural-born citizenship that mostly definitely is settled law: those born in the country to citizen parents. All other paths have unresolved doubts and are absolutely up for debate until the SCOTUS makes a ruling.” - BET
Wrong - There is one class of citizenship that is unquestioned, NBC (those born in country to two citizen parents). Other classes of citizenship may be challenged. in M Vs H the woman in question was NBC, therefore her citizenship was unquestioned.
(Readers beware: There are posters here on FR from TheFogbow.com that are trying to muddy the waters on purpose.)