But, of course, place of birth doesn't determine nationality, and also not necessarily modern nationality. I know a few families whose children were born in France, but have the Spanish nationality, and one of them changed nationality (not to French). Polish borders have shifted a few times, to highlight another problem.
I think the problem comes from trying to keep the text short.
Not saying they could but think of how many people have more than one citizenship and how many have none. Without a state you are shutoff from everything from the internet to basic rights or a legal place to live. Existing is most likely violating someone's law
- the fact that right to nationality is not the same as having it. France has the same right, but --as I already pointed out-- there are quite a few people born there who didn't take the nationality
- the fact that it can change, and that the inference becomes invalid in the future
I think the problem comes from trying to keep the text short.