I wasn't. Children of diplomats, ambassadors and military members are considered natural born because even though they leave the country, it's because they're in service TO it, so the political tie is still there.
§ 217. Children born in the armies of the state.
For the same reasons also, children born out of the country, in the armies of the state, or in the house of its minister at a foreign court, are reputed born in the country; for a citizen who is absent with his family, on the service of the state, but still dependent on it, and subject to its jurisdiction, cannot be considered as having quitted its territory.
Vattel, The Law of Nations, Or, Principles of the Law of Nature, Applied to the Conduct and Affairs of Nations and Sovereigns
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I was stating the general rule for most people and didn't bother stating the exceptions. My bad.
Vattel, from what i’ve read is what the framers relied on in part to shape the Constitution, but if this is true then they were aware there was exceptions to the rule for Natural Born. At the time of Vattel’s rules, Women were not equal and Blacks were property. I think the Framers were forward looking and maybe envisioned America as a world power were more exceptions might have to be made, which is why Natural Born is not clearly defined.