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Am I? Who knows
(startrek.website)
Source Page. Credit is to SMBC-Comics and even more credit to @aperson@beehaw.org who noticed it was missing and found the credit in this comment. Sorry about that and thanks, you're awesome aperson <3
This is the struggle session that launches a million "a sufficiently high fidelity copy of a person is literally the same person" takes, which often conveniently require the original person to die to maintain that "literally the same person" take. If the person didn't "go anywhere" and was told "congratulations, you teleported! Now kindly step into the biomass recycler because literally you is already at the destination" I don't blame that original from not going quietly.
https://www.existentialcomics.com/comic/1
Uhhh, excuse me? My takes are totally original. T'Pol told me so.
The “magic law” is just the consequence of what it means to be the “same” person. To be the same person, you have to, among other similarities, take up the same spatial-temporal space. This is why if we ask “is Bruce Wayne the same person as Batman” one of the first thoughts is “you know, I’ve never seen them in the same room before.”
Maybe what you’re getting hung up on here is the split. Let’s imagine there is one river (river A) which goes for a bit before it forks and becomes river b and river c. In some sense, we could say that both river b and river c are river a. But if you’re river b, then river c is not the same as you, and vice versa.
In the moment of copying, they're the same, after that, they're diverging through different experience. The difference in atoms/location is irrelevant from the perspective of that person's consciousness. They both are the original in any sense that counts for them or others.
I don't think that as the point of the episode. As their lives diverged their interests and desires did so as well. They were similar, yes, but still different people. Will was promoted after successfully evacuating the people of Nervala IV and he became focused on his career. Thomas was stuck on Nervala IV thinking of the woman he left behind, and when he's rescued he wants to rekindle that relationship whereas Will let it fizzle.
To say nothing of Thomas eventually choosing to join the Maquis. That is not something we'd ever see from Will.
Will: Good luck, Will.
Thomas: I actually thought I might go with the name Thomas.
Troi: Your middle name.
Will: I guess we really are different. I never really cared for that name.
Thomas: Well, I sort of like it. I guess I'd better get going.
Sure, if your totally-not-magic society has 100% fidelity printed people and is totally fine with someone with officer clearance printing a few hundred of themself to collectively pull rank in every part of a Star Trek ship at once and demand interchanging legal presence as if the same person was everywhere at once at all times no matter what individually differentiating experiences those 100% fidelity copies start picking up to distinguish themselves. Totally not a magic system. Totally not just your hangup and contempt for the idea of an individual existing outside of crude reductionistic principles.
There's actually a book series I enjoy, the Bobiverse series, that does an interesting take on it. In it a human, the eponymous Bob, gets digitized and becomes the AI of a Von Neumann probe. He's given the mission to make copies of himself, explore the galaxy, and build colonies for humanity.
Later on in the series...
As he makes more copies of himself, it's found that the personality of the copies diverge more and more the farther from the original that they descend, and they eventually devise a statistical way to measure this divergence. No two extant Bobs are ever the same person, even though they're identical copies.However, it's also discovered that if a Bob makes copy of himself, shuts down his original AI matrix, and only then the copy is turned on, that Bob will have no measurable divergence from the one he was cloned from. It's measurably the exact same individual, and it implies that in-universe there's some fundamental, tranferable property of identy. Arguably some kind of "soul".
Not only that, if the original AI matrix is turned back on then that one starts displaying the divergence that was expected of the copy. This is used in one case to transmit the data of a Bob to a waiting, empty AI matrix around another star to avoid physical travel and side step the teleporter problem.
There's a lot of sci-fi hand waving in it, but I thought it was a fun way to approach the question.