I would say that it is impossible detect what is the original picture. But the abstract idea of the Mona Lisa picture is still one.
This seems to be a dualist view. Appealing to the difference of instantiations ("I am here, you are there") without any other self-state difference, means to appeal to something outside the subject, "something separate from the thing having that identity". But if the two things are perfectly equal, what still remain to save us from a dualist (non materialist) conception of "personal identity"?
He never did before.To Complexity:
You should justify your assumptions.
steenkh said:I am unsure of this one. It has been shown that people can perceive stuff outside their bodies as being part of themselves, and amputees can feel pain in limbs they no longer have. This pain can be removed by giving them mechanical contraptions that they perceive as being their missing limb.
steenkh said:In short, the "self" is more complicated than what you outline here. Your transporter scenario fails because if you do not obliterate the original, you will have two copies, both of which feel that they are the original, but none of which feel that the other is themselves. Obliterating one of them is not the same as transporting a single self to another place.
Their location in spacetime. Even if the two brains are indistinguishable otherwise, they will have separate worldlines
I argue to get rid of that sharp distinction between subjective persons (this person is 100.0% me, that person is 0.0% me) and instead consider a continuum of similarities.
To answer to yy2bggggs, marplots, steenkh: If we suppose that the two brains have exactly the same state, the corresponding two (or one) mind(s) would have exactly the same memories etc. The surrounding world could be actually different if they are brains in two vats, but their subjective world(s) recreated in their mind (a la Matrix), should be perfectly equal (I suppose that they receive the same input). Maybe that the synchronization lasts only few seconds, but even after then, they would behave like two copies of you, one being you and one being you if you would have done something different than what you did a second ago. The memories would begin to be different only from that point. The differences existing before the syncronization time would have no influence at all (at least, inside the brain).
But if the personal identity doesn't depend only by the intrinsic subject state, this would imply that if your parents would have travel around the world while you are in formation, your organism could have a different personal identity (supposing that there's a moment during the gestation in which the personal identity is defined). This doesn't seem very reasonable.
I'm sorry, but different from what exactly? Take an official US penny that is in my pocket. Were certain exchanges different, it could be in France instead of in my pocket.But if the personal identity doesn't depend only by the intrinsic subject state, this would imply that if your parents would have travel around the world while you are in formation, your organism could have a different personal identity (supposing that there's a moment during the gestation in which the personal identity is defined). This doesn't seem very reasonable.
ANTPogo said:Croc411, you seem to be under the impression that "continuity of self" is something that exists independently from the physical structure (ie, brain) housing that "self".
ANTPogo said:All three of your scenarios have the same thing in common: from the point of view of the person involved, they would all subjectively have the same sense of "continuity of self".
ANTPogo said:That is, the person in scenario 1 chronologically experienced every moment of his 70 years of life, so as far as he's aware he's had the same "continuity of self" all that time. In each of your other two scenarios, the person is forcibly altered to be identical to a version of themselves that experienced those 70 years, but without actually physically going through those 70 years. However, if you ask any of them, all of them - scenario 1, 2, or 3, will report the exact same subjective "continuity of self". As far as all three of them are concerned, they've all been continuously alive for 70 years, and have the memories and experiences which shaped them to prove it.
Even though from an outside perspective, you know that only one of those persons lived a chronological 70 years, as far as each of them is concerned, they all lived a chronological 70 years. To the point where if you mix up those three individuals, so that you don't know which person was put through which scenario, you will never be able to tell them apart.
ANTPogo said:But even though each of these persons experiences the same subjective "continuity of self", they're still individual entities, and their objective existence can be ended. Because if there's no way to either subjectively objectively to figure out which person is a "copy" and which is the "original", killing one of them is still killing one of them, and will end that person's subjective "continuity of self".
This might not seem obvious if you're killing one of them instantly at the moment of creation, but what happens if you delay the killing for a while? Each of the versions, "original" and "copy" alike, will be undergoing different subjective experiences and creating new memories, diverging ever more into separate "selves".
No, the physical structure hosts the processes that create the continuity. Is that a correct definition for you?
At states A and E, yes.
I'm unsure to which scenario you refer to here. Is it the one with the three persons or the transporter suicide one?
marplots said:I also object that leaving out spacetime considerations seriously damages the exactness of the copies. After all, two particles may be indistinguishable, but the one I have here is different in what it can do and who it can dance with, than the other on Mars.
ANTPogo said:I'm saying that's not true, because what's being created is not one continuous being with a single "continuity of self", but two separate beings, each with a separate albeit indistinguishable "continuity of self".
ANTPogo said:If one of those beings dies (whether by suicide or other means), then one of those selves (a completely independent being capable of living its own unique life separate from its twin) will end.
AlBell said:IMO, atheism is illogical unless it fully accepts materialism as the ontology of choice, and vice-versa.
There is no problem because there are two brains, that they have the same personality or in your parlance identity does not remove the fact that there are ,two brains.In this case, to avoid a dualist methaphysics, you must think that personal identity depends by some external facts that not involve only the brain state. But what? gravitational forces or another kind of physical force that may influence "who is who"? I think that you may agree that it's no easy to solve this problem. Just constating that "I am here, you are there" may seem an explication, but it's not. It would imply that if your parents would have travel around the world while you are in formation, your organism would have a different personal identity.
Yes, but only 0.1% (made-up number, see post above) of its subjective existence will be lost. I disagree with the sharp on-/off-distinction.
Yes, but only 0.1% (made-up number, see post above) of its subjective existence will be lost.
I disagree with the sharp on-/off-distinction.
But, even so, how would you check?
(I think it is an illusory concept), but, what I am saying that:would be established at any single moment
I dont' think that personal identity (I think it is an illusory concept), but, what I am saying that:
1 - If we think that each of us has his/her individual personal identity, we must presuppose that he/she acquired it at a certain moment between conception and birth (or after the birth, this doesn't matter), probably in the same moment when we became a conscious being instead of an agglomerate of cell (choose you the moment you prefer).
2 - If we think that two identical brains placed side to side have different identities because located in different places, then, for the preceding point we should also think that the location where my personal identity began to exist had a role to define it.