It's so hard to imagine someone getting such drastic changes just... returning to normal.

[He mulls over Alex's responses a little bit, and shakes his head.]

I'm honestly having quite a hard time even wrapping my mind around some of these 'explanations', forgive me. Attempting to follow a line of logic, alternate realities crossing into this one still makes more sense. After all, how could a life be past if people are receiving technology, like robot arms, that's never existed before.