Why? Naturalized citizen is one who became a citizen by law after birth. Native born is one who became a citizen at birth. A far stronger case can be made that native born and natural born are synonymous than saying native born and natural born are.
The government in it's duty to define things makes laws, and under those laws as written by the First Congress in 1790 is the definition of Natural born citizen, which I am sure you are aware of given your ability to locate certain obscure documents that make your case.
I'll take that as a complement and yes, I've read the 1790 naturalization act. And no, it is not a definition of natural born citizen. The act itself dealt with naturalized citizens only and did not cover natural born at all. The entire text is here. So if Obama was born in Hawaii then nothing in the 1790 act would apply.
I thought the language was very clear on the issue, it defines who can become a citizen at the time of the first congress, it defines how their children would become citizens and finally it defines what it takes to be a Natural born citizen.
Clear and without the sort of legalese we see bantered about by lawyers trying to hide what is in plain view. Remarkably I might even suggest that Obama borrowed from this act it’s very essence when writing the McCain resolution.