I believe that cryonics can maintain the network, but not the internal state of the nodes; consequently I assign “too low to meaningfully consider” to the probability of restoring my personality from my frozen brain.
There is experimental evidence to allay that specific concern. People have had flat EEGs (from barbituate poisoning, and from (non-cryogenic!) hypothermia). They’ve been revived with memories and personalities intact. The network, not transient electrical state, holds long term information. (Oops, partial duplication of Eliezer’s post below—I’m reasonably sure this has happened to humans as well, though...) (found the canine article: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1476969/)
So, how indignant are you feeling right now? Serious question.
Not at all, on the grounds that I do not agree with this sentence:
Will you suspect the forces that previously led you to come up with this objection, since they’ve been proven wrong?
You are way overestimating the strength of your evidence, here; and I’m sorry, but this is not a subject I trust you to be rational about, because you clearly care far too much. There is a vast difference between “cold enough for cessation of brain activity” (not even below freezing!) and “liquid bloody nitrogen”; there is a difference between human brains and dog brains; there is a difference between 120 minutes and 120 years; there is a difference between the controlled conditions of a laboratory, and real-life accident or injury.
That said, this is a promising direction of research for convincing me. How’s this? If a dog is cooled below freezing, left there for 24 hours, and then revived, I will sign up for cryonics. Cross my heart and hope not to die.
If it turns out the cryonics works, would you be surprised?
If it turns out that cryonics as practised in 2010 works, then yes, I would be surprised. I would not be particularly suprised if a similar technology can be made to work in the future; I don’t object to the proposition that information is information and the brain is un-magical, only to the overconfidence in today’s methods of preserving that information. In any case, though, I can’t very well update on predicted future surprises, can I now?
Since you expect some future cryonics tech to be successful, there’s a strong argument that you should sign up now: you can expect to be frozen with the state of the art at the time of your brain death, not 2010 technology, and if you put it off, your window of opportunity may close.
Disclosure: I am not signed up for cryonics (but the discussion of the past few days has convinced me that I ought to).
There is experimental evidence to allay that specific concern. People have had flat EEGs (from barbituate poisoning, and from (non-cryogenic!) hypothermia). They’ve been revived with memories and personalities intact. The network, not transient electrical state, holds long term information. (Oops, partial duplication of Eliezer’s post below—I’m reasonably sure this has happened to humans as well, though...) (found the canine article: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1476969/)
So, how indignant are you feeling right now? Serious question.
Will you suspect the forces that previously led you to come up with this objection, since they’ve been proven wrong?
Will you hesitate to make a similar snap decision without looking up sources or FAQs the next time your child’s life is at stake?
Not at all, on the grounds that I do not agree with this sentence:
You are way overestimating the strength of your evidence, here; and I’m sorry, but this is not a subject I trust you to be rational about, because you clearly care far too much. There is a vast difference between “cold enough for cessation of brain activity” (not even below freezing!) and “liquid bloody nitrogen”; there is a difference between human brains and dog brains; there is a difference between 120 minutes and 120 years; there is a difference between the controlled conditions of a laboratory, and real-life accident or injury.
That said, this is a promising direction of research for convincing me. How’s this? If a dog is cooled below freezing, left there for 24 hours, and then revived, I will sign up for cryonics. Cross my heart and hope not to die.
If it turns out that cryonics as practised in 2010 works, then yes, I would be surprised. I would not be particularly suprised if a similar technology can be made to work in the future; I don’t object to the proposition that information is information and the brain is un-magical, only to the overconfidence in today’s methods of preserving that information. In any case, though, I can’t very well update on predicted future surprises, can I now?
Since you expect some future cryonics tech to be successful, there’s a strong argument that you should sign up now: you can expect to be frozen with the state of the art at the time of your brain death, not 2010 technology, and if you put it off, your window of opportunity may close.
Disclosure: I am not signed up for cryonics (but the discussion of the past few days has convinced me that I ought to).
I’m curious as to whether the upvotes are for the argument or just the disclosure. Transfer karma here to indicate upvotes just for the disclosure.