> I would say that both A and B would claim to be X and have the "continuous"[1] experience to be X while agreeing that they are distinct persons. I think that the question of whether A or B, both, or neither is the true X, is not a scientific question, and as a philosophical question, a fairly empty one.
I agree that it is not a scientific question, but as with virtually all ethical questions not being scientific doesn't mean it's empty. They are, in fact, very fundamental. This specific question might be empty now, but it won't be when people start messing up with brains (e.g. advancements in Neuralink).
In the hypothetical scenario, it is the most important question in the whole world from X's perspective because it involves, you know, them dying. X cannot be either of A or B, because they are indistinguishable (any argument proving A=X also holds for B=X, but A!=B so they are wrong). Saying that X is both A and B requires dualism (A's and B's experiences somehow get beamed to a third consciousness). Only X's death and A and B independence (with the same memories) is compatible with a position that doesn't involve contradictions or souls of some kind.
> Regarding the challenge, I would expect that the consciousness would be forked: there is a "me" that would awake inside the machine and would be very glad to be alive, while the "me" outside would experience dying. This seems to go against the exclusiveness of the experience of being themselves, but assuming the existence of the magically perfect duplication, both would be valid experiences and again neither could make a claim about being the real me. I don't find this to be a contradiction.
Do you not find a contradiction in saying that you cannot make the claim of being the real you just because your brain was copied? Suppose that this copy happens without you falling asleep and without you noticing: have you stopped being you?
> But all of these scenarios have been explored extensively. Are you familiar with the Egan's "Permutation City"?
I read it a while ago. From what I remember, it is based on Tegmark's mathematical universe hypothesis, which I find being hopelessly confused about the nature of reality. Doesn't the novel assume the consequent (it starts from the assumption that you can do this kind of manipulation with consciousness)? I had similar issues with Accelerando.
> [1] what does "continuous" even mean? Do one have a "continuous" experience of being yourself after a night's sleep? After anesthesia? After a coma?
Sleep and anesthesia? Of course: your brain is still active even if it is not recording memories. Coma it depends: unless you're brain dead, still yes.
Ok, but then I fear you're either contradicting yourself, or addressing a point I didn't make.
Let me restate:
1. energy123 says that, if we completely annihilate the body of X and then we re-assemble it one planck time later, X is still the exact same self after the annihilation as they were before.
2. I reply: a monist must hold the position that X died with the annihilation and the recomposed being is a different self, Y, which just so happens to have the same memories as X. If you insist that the new being is still the same self X, you must assume that something that was not in the body survived the complete annihilation of the body and was put back in the body during the re-assembly.
3. You attempted to say that that something was the information needed to recompose the body. But now you're saying that actually we have produced two entirely different beings, A and B, both of whom believe to be X.
I 100% agree with you that this is what happened. But you cannot tell me in the same breath that X is still alive. That is a contradiction.
The ultimate challenge is always the same: assuming the technology to perfectly copy and simulate a brain exists, would you upload your mind and do you expect that it is you that awake inside the machine? If you answer "yes" you must concede you are a dualist. A monist can only answer "no". And, as I gather from this discussion, a functionalist would (i) answer "yes" after redefining what "you" means, (ii) mean "no" because as you just admitted we created two new beings, (iii) upload themselves and then die happy knowing that something else with their memories will live on.
(I realize you actually have not explicitly objected to this specific challenge yet, so maybe we fully agree and that's that)
> If this actually happened, would the 'I' that replaced you be any wiser. How do you know this hasn't happened to you already? Maybe multiple times per second?
If this is true, that the body dies every planck time and the mind survives it, then it simply means the dualist position is true.
> The information of how to put your body and mind back must have survived somewhere, in the alien mind for example or the machine they used. But the information would still be in (a medium in) this universe and bound to this universe physical laws. I would say this is still a monist position.
I'm sorry, but you're circling back to the first message I wrote. You are giving to information magical properties that it cannot have, because they lead to a contradiction. With the same information you can make multiple copies of me at the same time. But if you make two, the experiences of one do not get magically transmitted to the brain of the other. So those are two distinct selves, even if they are made with the exact same information. This clearly does not work. It's the same issue of mind uploading that I initially argued about.
> if I draw a square on a piece of paper, and then light that paper on fire, I haven’t destroyed the concept of a square. I can always draw an identical square on another sheet of paper. If the square had consciousness, it’d be none the wiser.
If you have a son and you kill him, you haven't destroyed the concept of a son. You can always make a new son. If the son had consciousness, it’d be none the wiser.
Is that the same son? Do you not go to prison for murder?
Sorry, perhaps I just don't know what "monism" truly means, I admit my ignorance, but if we just limit ourselves to the mind-body problem, I just meant that a dualist position considers the mind as separate from the body, and monism rejects that.
The functionalist point of view you propose doesn't seem to be to be useful at all in this context. Let's backtrack. The original example I provided you when you asked about whether there can be somebody proposing monism and at the same time holding dualist positions was asking:
"If I do mind uploading, do I die?"
You can be creative in redefining what the word "I" means, which is what you engaged with, but when push comes to shove and I do the actual mind uploading, then the self that experienced my qualia since birth will irreparably stop experiencing qualia (aka: dying) and be replaced by another self. You're free to call that self as if it was me, and be all happy it can do the same things I could do, but that's not gonna change the fact that my previous self (the only "I" that matters to me) died.
Would you step in the Star Trek teleporter knowing that you will die, and think you haven't died just because you have been replaced by a different being that is functionally equivalent to you? I sure as hell will never do it.
Just because the brain doesn't form memories while you sleep, doesn't mean you have ceased to exist. You have probably forgot many things that have happened to you today: does that mean you didn't exist in those moments you forgot? Am I misunderstanding your point?
> What if they destroyed and reassembled only 0.5% of your brain? What's your dividing line? 0.36%? 0.0188%?
Apologies, I read too quickly and skipped over this. See one of my sibling comments. I concede this is problematic for my position and I need to think harder on how to solve it, but I don't think it's unsolvable. The placeholder answer is that there must be a certain level of damage -- the precise % probably doesn't matter as much as exactly which parts you destroy -- that is incompatible with keeping continuity.
For the rest, as a social construct, if we incinerate me to create a clone of me that is identical to the original at the subatomic level I agree that, for everyone else in society, it is me. But my self has still died and whatever replaced it is having its own experiences. And it matters very little what everybody else thinks: if tomorrow an imposter convinces everybody else that they are me, they aren't me for me. Their experiences aren't magically beamed to my brain.
Your tennis ball example is again a textbook dualist position. You can have a tennis match with different balls which is functionally identical to have it with the same ball, because the ball in the game is an abstraction that lives _outside_ the ball itself. But, assuming balls can feel when they are hit by the racket, the ball you used in the previous point and now is lying on the sideline does not feel being hit when the next point starts with another ball.
None of these scenarios would result in "me" from a monist perspective. The destruction is a discontinuity point, I died there and then, and then the next planck moment a new being was created with all my memories. But "I" died.
The functionalist answer, as you understand it, is dualist. It says "something" survived the utter complete destruction of the physical body and was "put back in it" once it was reassembled. If "it" survived the complete physical destruction of the body, it must be somewhere else, detached from the body.
And, you know, there's really nothing wrong being dualist. I do not mean to denigrate that specific worldview. What is problematic is claiming to be a staunch monist while holding dualist positions.
I admit that this is a troubling problem with the position that I stated, but I don't think it's a complete takedown.
The easiest rebuttal would be to simply say that continuity is not a mere implementation detail. If you give up continuity, you can make a copy without altering the original, you just have to read it.
But if you need to ensure continuity you have to alter the original. This seems to me a very fundamental part of the process, making it qualitatively different.
A true monist would realize that any experience of the uploaded being that received a copy of the brain is not felt by the original brain that has been copied. This is a fact and it is elementary to see it as true, as well as supporting the view that the copy is not the same being at all. If your description of computation functionalists is accurate, then they simply are dualists and would do good in admitting this to themselves.
Invoking the Ship of Theseus is a distraction. The Ship of Theseus paradox does not involve a full copy at the atomic level while the original still stands. If it did, the paradox would not even exists. The paradox exists because there is the key element that you do not have in mind copying/uploading: _continuity_.
I don't know if this is discussed by actual serious philosophers, but consider the issue of "mind uploading." I have seen very staunch monists seriously discussing that, if you were to produce a complete digital copy of your brain -- copying any possible information to the most minute synapse -- then you effectively "uploaded" yourself into a computer and can live a digital life.
These people believe this while at the same time considering dualism so ridiculous as to laugh dualists out of the room. The evident problem being that "mind uploading" is the most dualistic possible position to take. A real monist would easily see that by doing mind uploading you have just created a clone that is a whole separate entity from yourself and it is not yourself.
You do realize that the literal first factor that is used to calculate that index is GDP per capita, right? And that life expectancy (another factor) correlates with the GDP of the country?
https://en.wikipedia.org/wiki/Banana_Massacre
Read more history.