I was thinking about this this week even before I saw this thread, since yesterday I was looking up
Roko's basilisk to see if I thought it was as stupid as it sounds at first (spoiler: it is), and I'm reading "The Quantum Thief" which deals constantly with continuity of consciousness, uploading brains to computers, etc. I'm almost totally a philosophical materialist, and if I was absolutely a materialist I suppose I would have to believe that consciousness and my sense of self is an emergent property of a particular arrangement of particles in the physical world. Since one's time-sense is linked to one's consciousness, after death I guess a functionally infinite amount of time would pass until that particular arrangement came into being again (via quantum fluctuations, or a new big bang, or something who had the ability to recreate you in some way), or some other arrangement which generated the same effect. Thus, you'd never really die, or at least, your consciousness would never end in your experience. I think Nietzsche called this the "eternal return".
I have a lot of issues with this belief, though. It seems to presuppose the self and consciousness as some sort of unitary thing, which... kind of goes against materialism in some way, somehow? I have a hard time explaining this, but I'll try. I'm me, I have this consciousness that seems to be here, and that's based on an arrangement of particles. Fine. Why would another arrangement in some other place and time continue this particular consciousness? I don't (directly) experience the consciousness of others. Why would "I" experience the consciousness of another brain like mine that was recreated trillions of years in the future, even if the arrangement was identical? Doesn't that kind of imply the existence of something beyond matter which is being transferred between the two? Since we're dealing with infinite periods of time and matter arrangement, what if two identical brains were to come into existence at the same time? Which one would be "me"?
Of course, you might ask the same kinds of questions about going to sleep on a dreamless night, or anything else that interrupts the experience of consciousness. I can't remember who said it, but I recall reading Borges quoting someone who said something along the lines of "Yesterday's [person] dies in today, today's dies in tomorrow." Try not to think about that before bed.
Here's another thing to not think about. Given a purely materialistic understanding of the universe and consciousness, and an understanding of random thermodynamic fluctuations, what's more likely: that our lives are actually what we think they are, or that we're just a fucking brain floating in space imagining shit?
Ludwig Boltzmann came up with the general parameters of the argument, which I don't particularly feel like thinking about much lest I go insane like he did. Suffice to say, I find it a depressingly realistic possibility. Even if we are actually here, after death it might be more likely that we come back as Boltzmann Brains trillions of times, experiencing who knows what. Hopefully something good! Maybe just everything.
Anyway all these issues and a few others related to
the measurement problem, which I don't claim to fully understand, as I only have enough education in quantum mechanics to fuck up solving one particle Hamiltonian equations on my pchem tests, have led me to qualify my materialism. I think there's something else going on here, even if I don't have any idea what it is.
I mean, I hope so. I don't want to be a Boltzmann brain, I don't think "nothingness" is a meaningful concept, and I'm not about to start believing in some religion or something. That would be crazy, unlike the concept of a floating brain identical to my own randomly coming into being via thermodynamic fluctuations, which is completely sane and normal. Anyway, I picked reincarnation.
this post is really pretentious and i'd like to apologize to anyone who read it. what the fuck am i doing thinking about dying on a saturday night. i wish i was in one of the quantum universes where i have a girlfriend