For years, I've had this story in my head about a man who jury-rigs an emergency interplanetary teleport with nanites scanning and dissolving him at one end and a bioprinter reconstituting him at the other, with the optional twist at the end that the nanites rewrote their instructions to just scan and not dissolve him, to satisfy Asimov's Third Law, so now there are two of him.
Until slightly less years ago, I had it in my pile of "ends without a story." Then I started to think about beginning the story like that, and exploring the consequences of being copied. I know, it's hardly new ground (there are only about twenty episodes of Star Trek
about such matters), but I'm not sure where to go with this. I'm thinking along the lines of "can a soul be duplicated?" and "What's the difference between a soul and a personality?" (Going with the assumption that his brain been scanned and re-formed at a sufficient resolution to leave all his memories intact)
The question is, if I go down this path, what does
a soul look like, next to the other things that we look at when deciding what makes a person who they are?
I think I have two or three options on where to go with outcomes: one does not have a soul (which one has the soul is another question to ponder) and has to be destroyed, the non-ensouled one eventually gains a new soul, and this makes him express differently in some way, or some other option I haven't thought of because I haven't answered for myself the nature of souls for the purpose of the story.