with regard to "Yet your view seems to imply that, since the original was killed, despite having a living, talking Chris Hallquist in front of you, it's somehow not really him."
Yes, I do believe that the copy of Chris Hallquist would have an identical consciousness (until, as you stated, he had some new experiences), but the original (non-copy) Chris is still gone. So from a functional perspective I can interact with "copy of Chris" in the same way, but the original, unbroken consciousness of "original Chris" is still gone, which from the perspective of that consciousness, would be important.
with regard to "Both "Chris" and "copy of Chris" are Chris Hallquist." I still am confused: they may have the same structure, function, and properties, but there are still two of them, so they cannot be the same thing. There are two entities; just because you made a copy doesn't mean that when you destroy the original that the original isn't changed as a result.
Why do you consider Chris Hallquist to be the same person when he wakes up in the morning as he is when he went to bed the night before (do you?)?
There are two entities; just because you made a copy doesn't mean that when you destroy the original that the original isn't changed as a result.
The original is changed. And I agree that there are two entities. But I don't see why Chris Hallquist should care about that before the split even occurs. Would you undergo the amnesia procedure (if you were convinced the tech worked, that the people were being ho...
Background:
On the most recent LessWrong readership survey, I assigned a probability of 0.30 on the cryonics question. I had previously been persuaded to sign up for cryonics by reading the sequences, but this thread and particularly this comment lowered my estimate of the chances of cryonics working considerably. Also relevant from the same thread was ciphergoth's comment:
Based on this, I think there's a substantial chance that there's information out there that would convince me that the folks who dismiss cryonics as pseudoscience are essentially correct, that the right answer to the survey question was epsilon. I've seen what seem like convincing objections to cryonics, and it seems possible that an expanded version of those arguments, with full references and replies to pro-cryonics arguments, would convince me. Or someone could just go to the trouble of showing that a large majority of cryobiologists really do think cryopreserved people are information-theoretically dead.
However, it's not clear to me how well worth my time it is to seek out such information. It seems coming up with decisive information would be hard, especially since e.g. ciphergoth has put a lot of energy into trying to figure out what the experts think about cryonics and come away without a clear answer. And part of the reason I signed up for cryonics in the first place is because it doesn't cost me much: the largest component is the life insurance for funding, only $50 / month.
So I've decided to put a bounty on being persuaded to cancel my cryonics subscription. If no one succeeds in convincing me, it costs me nothing, and if someone does succeed in convincing me the cost is less than the cost of being signed up for cryonics for a year. And yes, I'm aware that providing one-sided financial incentives like this requires me to take the fact that I've done this into account when evaluating anti-cryonics arguments, and apply extra scrutiny to them.
Note that there are several issues that ultimately go in to whether you should sign up for cryonics (the neuroscience / evaluation of current technology, estimate of the probability of a "good" future, various philosophical issues), I anticipate the greatest chance of being persuaded from scientific arguments. In particular, I find questions about personal identity and consciousness of uploads made from preserved brains confusing, but think there are very few people in the world, if any, who are likely to have much chance of getting me un-confused about those issues. The offer is blind to the exact nature of the arguments given, but I mostly foresee being persuaded by the neuroscience arguments.
And of course, I'm happy to listen to people tell me why the anti-cryonics arguments are wrong and I should stay signed up for cryonics. There's just no prize for doing so.