But then again, who is to say that the restoration process will take the form of thawing out the brain. An advanced digital scanning technique could imprint the brain image onto an organic robot, thus making it possible to have many copies of the same person.
I also find the concept similar to the teleport. You may be the person who goes in, but are you the same person who comes out the other end? Indistinguishable from you, only you are not the observer of your own reality.
[Edit: A couple of really obvious grammatical errors]
Cloning the particles (and their states) that make you up would most likely produce a separate mind, as I think would teleporting where v1 is destroyed and v2 consisting of different particles, although in the same configuration. But what about separating said configuration, transporting them somewhere else and putting them back together? Cryogenics is in my opinion the only possible way to give a chance in preserving an original mind well beyond natural human lifespan without actually extending it.
Not only can't others tell a clone apart from the original: the hypothetic clone, as I understand it, couldn't do that either. Now what if this process, due to cellular regeneration in the brain, happens constantly? Your mind is not the same it was a minute ago: that mind is dead and gone. Would it even matter?
[1] See http://www.economist.com/news/science-and-technology/2166333... [2] See https://en.wikipedia.org/wiki/Fragmentation_(reproduction)
http://econlog.econlib.org/archives/2009/12/what_do_philoso....
http://www.preposterousuniverse.com/blog/2009/12/15/who-are-...
Probably there'll be animal experimentation first. Then when Fido's still able to fetch they'll give humans a bash.
Where my thoughts end up more in the personal beliefs rather than scientifically backed is down to what the observer is defined as. Could this be the same as a soul?
One thought that I have is whether the physical state is bound with a non-physical state, like you (non-physical) controlling a remote controlled car (physical). By freezing the subject you could detach this binding, and by thawing you could reattach another observer, maybe based on proximity, with the memories and physical mind of the original.
Hollywood has pretty much covered all these concepts in one shape or another.
[1] The Prestige - Teleportation
[2] 21 Grams - Existence of a soul
[3] The Matrix - AI controlled future
A long (but relevant) web comic.
I imagine it should be terrifically hard to let go of your child and 'kill' them preemptively, for them to have a hope of later life. Even if the parents did even consider that option.
As far as I see it, cryopreserving a person that is not legally dead ('cryothanasia'?) might be possible, but no cryonics company has procedures in place to arrange for it and I am not aware of anyone that has been preserved this way. At least, it is necessary to move to a country where voluntary euthanasia is legal and the associated autopsy is not mandatory, and you are on your own with this. [1] This is another issue that cryonics companies and advocates prefer to overlook.
Cryonics is still very niche as it is. People are still very reluctant to arrange for cryopreservation beforehand, as it is. Cryonics companies have their hands full with just continuing to operate and convincing people to use their services. For there to exist people that are fully rational about their own or their loved ones' death, and think about it more deeply than the cryonics companies and advocates, is a whole next step entirely: I am unaware of such people yet.
You seem to be arguing that death is a binary state, but I don't think this is particularly well established. There are all sorts of arguments over what constitutes definite proof of death [1]. It seems more likely to me that the process of dying is a transition, and that the exact point along that transition where someone is irreversibly gone depends on our current level of medical technology – which is exactly what cryonics is betting on.
As an analogy, when RAM loses power, the data on it doesn't vanish instantly, but rather degrades over some period of time [2]. Depending on how the information is stored, what you're willing to do without, and what you can piece together, you can declare the data in RAM "gone" at different points throughout that process.
[1] https://en.wikipedia.org/wiki/Medical_definition_of_death
[2] https://www.usenix.org/legacy/event/sec08/tech/full_papers/h...
[1] http://chronopause.com/chronopause.com/index.php/2012/05/20/...
[2] http://www.brainpreservation.org/preservation-rights/
[3] http://www.oregoncryo.com/aboutCryonics.html
[4] http://www.huffingtonpost.com/zoltan-istvan/should-cryonics-...
Perhaps one way to think about it is that cryopreservation is a modern alternative to a grave burial, and the thing most salvaged is the hope and memories in the family and friends of the deceased.
Her personality and memories, of course. Most of the brain is back-office, keeping the body alive and doing low level processing. The parts containing "her" could easily be untouched by cancer. Keeping just her brain frozen is a bit of a stretch, but all the hurdles are strictly technological in nature. Make a clone (or a partial clone, if you have ethical concerns), cut and paste the good parts into the clone and you've healed her completely.
It may seem a lot right now, to fuse brain parts together or to do head transplants, but they aren't really that far-fetched. Barely 100 years ago we were still arguing whether heavier-than-air flight is possible, and weren't even dreaming concepts like radiation or turing computability. Compared to that making nerves grow back together is just elbow grease.
(1) Resuscitate cryo-preserved (vitrified) brain tissue.
(2) Re-create a body and somehow transfer this brain or mind into it (or upload consciousness)?
... then it is likely that we would have such a deep understanding of consciousness and mind that we could repair or scan-around the damage. I think we're talking about "singularity" levels of both technology and philosophical comprehension here. It's all total sci-fi for the time being.
I don't fully disagree with you, but this is sort of begging the question, since cryonics seems to rely heavily on the chance of unforeseeable advantages.
On top of that, you seem to be committing the common fallacy of equating every minute of life as the same, whether you're suffering terminally in a hospital bed or watching the sunset with friends (this is also why people choose to be taken off the respirator or have DNRs). Using something like QALYs makes infinitely more sense (though switching to QALYs may not quite invalidate your point).
Because if not, then we don't know if it works on people who aren't yet dead. And if we can't do that, what hope do we have for reviving the actually dead?
(I'm aware in rare cases people have been massively cooled down and had their heart stopped for operations, but that's not quite the same.)
That said, there is evidence available today. 21st Century Medicine is a company that does research on cryoprotectants. Their chief science officer is Greg Fahy, who co-invented the first method for cryopreserving embryos[1].
21st Century Medicine's primary goal is to research new ways of cryopreserving tissues. This is already useful for research and some tissue banking (embryos, corneas, etc). If improvements continue, it could allow for organ banking. But the brain is an organ, and cryopreservation technologies work quite well on it. For example, 21st Century Medicine can take a slice of a rat's hippocampus, cryopreserve it, and thaw it. Afterwards, it's still viable tissue.[2] This is very important, as the hippocampus is not only crucial for memory consolidation, but it's the part of the brain most vulnerable to ischemic damage (especially the CA1 region).
21st Century Medicine has also experimented with whole organs. They've taken a kidney from a rabbit, cryopreserved it, thawed it, and transplanted it back into the rabbit. Then, after removing the remaining kidney, the vitrified-and-thawed kidney kept the rabbit alive indefinitely. Alcor uses the same cryoprotectants as this experiment.
If cryonics works, this is exactly the sort of evidence you'd expect to see today. Granted, it probably won't work, but the expected value is positive.
1. Ice-free cryopreservation of mouse embryos at −196 °C by vitrification (http://www.nature.com/nature/journal/v313/n6003/abs/313573a0...)
2. Cryopreservation of rat hippocampal slices by vitrification (http://www.21cm.com/pdfs/hippo_published.pdf)
3. Physical and biological aspects of renal vitrification (http://www.21cm.com/pdfs/12FahyORG5-3%5B1%5D.pdf)
When a shooting or stabbing victim goes into cardiac arrest due to massive bleeding, even the most heroic attempts at resuscitation fail 90 percent of the time. But a study to begin this month under the direction of Sam Tisherman and Patrick Kochanek at the University of Pittsburgh Medical Center Presbyterian Hospital will see if there's a better way: cooling the body after the heart has stopped beating, to the point where all other functioning virtually ceases as well.
By putting patients literally into a state of suspended animation—or "emergency preservation," as Tisherman calls it—the surgeons intend to preserve brain functioning long enough to close wounds that would otherwise be fatal.
[0] http://news.nationalgeographic.com/news/2014/04/140402-suspe...
I thought This American Life's episode on cryonics was riveting, educational and fascinating.
http://www.thisamericanlife.org/radio-archives/episode/354/m...
Probably they mean youngest legal human, or youngest post-birth vitrification.
This is Alcor, the most established and expensive option. Their list prices are $80,000 for neuro (brain only), $200,000 for whole body preservation [1] There are various funding options. [2]
Cryonics Institute, the other US-based organization, charges $28,000 for full body [3] (they don't offer neuro)
Russian KrioRus charges $12,000 for neuro and $36,000 for full body. [4]
NB: if the cost seems high, keep in mind that most of the money is supposed to be held in trust for the cryonics patient so that income from principal can pay for long-term storage. [5] History proved that it's the only way to reliably and sustainably finance cyopreservation, potentially indefinitely.
I am not affiliated with any cryonics organization, just researching my options.
[1] Alcor FAQ: Cost http://www.alcor.org/FAQs/faq01.html#cost
[2] Alcor: Funding http://www.alcor.org/BecomeMember/sdfunding.htm
[3] Cryonics Institute FAQs: http://www.cryonics.org/about-us/faqs
[4] KrioRus: Human cryopreservation http://kriorus.ru/en/Human-cryopreservation
[5] Cryonics FAQ by by Ben Best http://www.benbest.com/cryonics/CryoFAQ.html#_IIIG_
