That's also a possibility. There are people here from different worlds. Different universes, or different versions of the same one.

[No wonder Tony had dug up this kid. He didn't take the simple answer, did he?]

There's also the possibility we don't leave at all. We could be... copies, something like that, and the real versions sit and home and never know better. Evidence seems to suggest that's not the case, but honestly... hard to say how trustworthy that is.

[None of these possibilities doesn't have staggering ethical implications either.]