As a hobby SF writer (in the past), I disagree. In fact, there are issues to figure out that more pressing than body-soul dualism. For example, here: Could the spouse be tried for bigamy? Multiple spouses suggests yes. Only one marriage certificate suggests no. — Dawnstorm
These relate to whether you're a legal positivist or not. Yes? Then the cert. does it's job and there is no problem.
No? You need to figure out your own intuition about who is who - but that's not really pertinent here. The law runs according to the above.
Ignoring that the two people are
qualitatively, AND numerically different after any span of time isn't really the fault of the facts, if you see what I mean.
Wait, only one marriage certificate? Two individuals sharing the same certificate? After all, both of them have the same history, so that one certificate is valid for them both. — Dawnstorm
As I said, they are not the same person on ANY conception except Immaterial Soul (and that's assuming the soul jumped to Mars.. you may hold the view, and think that's not happening). There is no problem.
So what about... oh, I don't know... debt? You borrow a dollar on Monday, get duplicated on Tuesday, and now what? Do I get two dollars on Wednsday? After all, no matter who pays me, the other didn't pay me and still owes me a dollar. — Dawnstorm
Who are you referring to? There are two
different people. It is not possible the person on Mars is party to the contract in question (on this account). Problem solved (in all three cases you've mentioned). Though, all of this
assumes legal positivism.
If it's a freak accident, people will figure things out, but in the Star Trek case... it's a transporter malfunction. You know what that suggests to anyone even remotely familiar with the history of invention? That's right: human duplication technology. — Dawnstorm
I'm unsure what you're driving at here, so my response might seem off-kilter. A transporter malfunction is exactly what the Branchline case is. So, I cannot see that this is an issue of any kind. Thought, you could make the argument that this presents an issue for
them because they don't legally exist. But again, not relevant to the discussion as it could be solved by generating a birth certificate (see the NB below for why that might make sense).
So here's the question: solve those legal problems and see whether your approach tells you something about your instinctive attitude towards the problem at issue. Maybe? — Dawnstorm
There was no problem to solve. Well, to be more accurate, my conception removed the problem. So, it seems unhelpful to restate a problem which this account removes. Person B is
not analogous to person A beyond the exact moment of creation. In that moment, all of these issues arise. But they die away just as quickly.
NB: probably worth realizing that in a world that this machine exists, the Law knows about it and has anticipated these problems. In any case, these are legal issues, not metaphysical ones. The two people are distinct in all meaningful ways. Their mentality is different, their personality is different (as a result of their mentality), their body is now different from being in a different environment, subject to different forces and chemical interactions, their thoughts are divergent, their emotions are divergent etc.. etc.. etc.. Sharing an extremely similar physical and mental make-up does not an identity make.
If there's something meaningful that remains between teh two, fire it at me
:)