The WKA decision did create a defined third type of citizen, that they called “native citizen,” that was anyone born in the US while legally under its jurisdiction, as their version of 14th ammendment citizenship.
Prior to the 14th, they were not deemed citizens.
Prior to the 14th all persons not born of two citizens had to be “naturalized.”
ONE parent.
The intent of the law was to show that they didn't need naturalization - they were natural born.
Once again - binary. Natural born or naturalized.