Alien space ship of no Earth nationality?
I have no idea what kind of point you are attempting to make with this "thought experiment."
Sure you do. I am demonstrating how ridiculous is an idea of citizenship based on hair splitting about being born inside our borders.
It has been a useful exercise for me. It made me realize that Abortion and jus soli citizenship are connected by the same thread, while pro-life and jus sanguinius are also connected by a common thread.
Abortion proponents argue that an unborn child is NOT A PERSON until born. Jus Soli proponents argue that a child is not a CITIZEN until born, and then it depends on where the child is born.
Pro-life, and jus sangunius both argue that the characteristics of the person are created at the moment of conception, not at some later date by some threshold criteria.
A fetus is a human being at conception. It is not a citizen. Having its citizenship be determined by time and place of conception would be ridiculous since, unlike a birth, it wouldn’t be possible to authenticate it.
This is a really dumb argument.
And if it was born on an alien spaceship, it would have the citizenship of whatever planet the ship was from.