Research was done extensively years ago on FR with legal minds included in research people. It was clear what was meant originally, also with SCOTUS decisions from years ago.
NBC meant then, and there is no reason to change the mean because people forgot over time, jus soli and jus sanguinis; born on US soil and citizen parents, plural.
I was taught in school that it meant 2 citizen parents and born on US soil. Note: the citizen parents did not have to be born on US soil.
Even the Congress in 1790, had disagreements as to what a NBC was, so I don’t know that I would say we’ve forgotten. My opinion is that if the Constitution had defined the term, there would be no issue with what it meant.
If you look at the early Congress and how they defined citizenship—it hinged largely on the father-so had the constitution defined the term, it may not have even included both parents, as long as the Father was a citizen, and the child was born on US soil.
There’s been too many arguments over what it means for more than a couple of centuries. Best to clarify it and define it once and for all. JMHO. YMMV.
Any way that’s an old worn out argument, and we have a lot of more interesting things to occupy our brains about today, so why don’t we stop the slide and get back to current events?