There you go! Excellent.
The 14th amendment hasn’t been challenged in the way you have been presenting it and the way the 14th amendment is written she is a US citizen.
Natural born would then mean anyone born on US soil or to at least one citizen parent abroad. As opposed to naturalized, which would be someone born abroad to non citizen parents.
You said natural born citizen was legally defined and Cornell says you're wrong.
She is a citizen through USC 8 Sec. 1401 naturalization, not through the 14th Amendment.
No it doesn't. It means anyone who is born a citizen without resort to statute. Statutes are man-made. "Natural born" refers to someone who does not need a law to make them a citizen.
They are a "natural" citizen.
If you have to have a law to make you into a citizen, you are not a natural citizen.
Congress only has the power of naturalization. They cannot through a law, cause a man to become a woman. They can make a law that says so, but this does not alter reality.
They also cannot make natural citizens, they can only make naturalized citizens.