Are All Humans Known Oxygen Is Part of It?

Oxygen is something that has to be learned after the fact. You can't just learn it from the definition of what air is, or breathing is. It's not necessary that you're breathing oxygen; you could breathe something else and then die. Sargon, so uk. Marxism. D l c failed. Thinks tor question said, tis argon, have all humans known oxygen is part of itsa say again, if all humans have experienced breathing, correct then have all humans knew oxygen is partof it? But they know that air is pass ofit. So near the composition, if it though, got your end. Sentinal apologetics, typical theology.