[drpix]

Many foreign flights from Canada & the Caribbean are granted the privilege to fly through US air-space. Neither those aircraft or any of the passengers are considered to have "entered" the U.S..

Without a landing, births on those flights are legally outside the U.S.. "Jus soli" ("right of soil") means what it means. Space craft and their passengers outside the earth's atmosphere fail even more to meet "jus soli."

[DiogenesLamp]

Many foreign flights from Canada & the Caribbean are granted the privilege to fly through US air-space. Neither those aircraft or any of the passengers are considered to have "entered" the U.S..

Without a landing, births on those flights are legally outside the U.S.. "Jus soli" ("right of soil") means what it means. Space craft and their passengers outside the earth's atmosphere fail even more to meet "jus soli."

For the purpose of the thought experiment, technicalities are irrelevant. The entire point of this mental exercise is to demonstrate how silly it is to regard birth above our soil as a conveyance of citizenship. Anchor babies ought to be as clear of a case of this as anything else, but somehow people don't seem to be able to see the absurdity in something unless the absurdity is raised to ridiculous levels.
(Argumentum ad absurdum.)