Anticipation and faith are both aspects of the human decision process, in a sense just subroutines of a larger program, but they also generate subjective experiences (qualia) that we value for their own sake. Suppose you ask a religious friend why he doesn’t give up religion, he might say something like “Having faith in God comforts me and I think it is a central part of the human experience. Intellectually I know it’s irrational, but I want to keep my faith anyway. My friends and the government will protect me from making any truly serious mistakes as a result of having too much faith (like falling into dangerous cults or refusing to give medical treatment to my children)."
Personally I've never been religious, so this is just a guess of what someone might say. But these are the kinds of thoughts I have when faced with the prospect of giving up the anticipation of future experiences (after being prompted by Dan Armak). We don't know for sure yet that anticipation is irrational, but it's hard to see how it can be patched up to work in an environment where mind copying and merging are possible, and in the mean time, we have a decision theory (UDT) that seems to work fine, but does not involve any notion of anticipation.
What would you do if true rationality requires giving up something even more fundamental to the human experience than faith? I wonder if anyone is actually willing to take this step, or is this the limit of human rationality, the end of a short journey across the space of possible minds?
What would be the consequence of giving up the idea of a subjective thread of consciousness?
I wonder if believers in subjective threads of consciousness can perform a thought experiment like Chalmers' qualia-zombie thought experiment. I gather that advocates of the subjective thread hold that it is something more than just having certain clumps of matter existing at different times holding certain causal relationships with one another. (Otherwise you couldn't decide which of two future copies of yourself gets to inherit your subjective thread). So, advocates, does this mean that you can imagine an alternate universe in which matter is arranged in the same way as in our own throughout time, but in which no subjective threads bind certain clumps together? That is, do you think that "subjective-thread zombies" are possible in principle?
Just as in the Chalmers thought experiment, subjective-thread zombies would go around insisting that they have subjective threads. After all, their brains and lips would be participating in the same causal processes that lead you to say such things in this universe. And yet they would be wrong. They would not be saying these things because they have subjective threads, since they don't. And so, it seems, your insistence that you have a subjective thread also cannot have anything to do with whether you in fact do.
It seems that the idea of subjective-thread zombies is subject to all the problems that qualia zombies have. How do advocates of the subjective thread address or evade these problems?