Which is why I referred to that, up above in #302.
What I'm using to come to that conclusion is a combination of things, including (but not limited to):
1) Citizens are not the same thing as Subjects
2) Law of Nations give a definition for NBC
3) The framers and founder relied on Vattel's work (i.e. Natural Law) for both the Deceleration of Independence & the Constitution
4) John Jay's letter to Washington (the president of the Constitutional Convention) pre-dating the first appearance (in their draft's) of the NBC requirement
5) Someone born with dual citizenship (or more) has allegiance at birth to a foreign government/entity
6)The NBC requirement for POTUS & Commander in Chief of the military, goes "beyond" the "simple" requirement of only citizen for all other government positions referred to in the Constitution
7)The "mindset" of the framers having just won, against most odds, a bloody and costly war, "grandfathered" themselves past the requirement of NBC due to their sacrifice and the fact that the first eligible NBC would not have been possible until 1811.
etc.
There is NONE. That is the point. You may be right in your assessment. You may be wrong in your assessment. The point is there is no definition and it is just a guess.
I prefer the strictest interpretation but I don’t believe that is what would happen in the 21st century.