To point of absolute zero or close to it where even atoms and molecules would be frozen.
Both. The former exists - small molecule crystallization inhibitors have been invented that disrupt the formation of ice in the first place. The latter is only possible if the damage is not so great that the person is dead by the information theoretic criterion.
This means, practically, that if you knew the covalent level bonding of every atom in their entire mind, and had a perfect understanding of neuroscience and limitless CPU power, could you restore their original mind state, to within a certain level of tolerance?
We don’t know if a frozen brain, mushed by expanding ice, is damaged too heavily for that to be done. We do know that a brain converted to ash is damaged too heavily - the ash is just lumps of carbon with essentially no information remaining. Or a person embalmed and buried.
But this only applies if there is ice crystals.
Unless they find way where there is no ice crystals.
Generally, somebody who has been cryogenically frozen has suffered brain death. That means a certain level of damage has already occurred. Also, any technique to prevent ice crystals from forming can impose its own form of damage.
So, even in the case there are no ice crystals, repair to the brain is necessary if resuscitation is to be possible at all.
Trouble is that to get there you need to transition through the temperatures where ice crystals do their damage. There are snap freezing technologies that cool very quickly, so that the crystals are much smaller, and do less damage, but you still must cope with working out what happens during the transition. There are limits to how fast you can cool an object. Even doused in a vat of liquid helium a head won’t cool instantly. (Helium is bad for this for all sorts of reasons, but any cryogenic liquid won’t cool an entire brain instantly, so you need to work out what the temperature/time gradients are throughout the mass, and it is likely that you can’t avoid damage to the interior no matter what.
It isn’t clear what you mean by something too cold for ice crystals. Ice crystals will exist perfectly happily at 1 K.
Yes, it is unsolvable by any technology we have now or are in development of. Your conjectures are in the realm of “if we had ham, we could have a ham on rye if we had rye.” Invoking imaginary technologies with imaginary perfection doing imaginary procedures is not thinking through the problem. On the contrary, it utterly sidesteps the problem.
However, I’m just a pedant. Perhaps if I were a hanging crystal such mumbo-jumbo would be meaningful to me.
We have the ham though. It’s just a really small piece of ham. And we’ve got the rye as well. Saying “it is unsolvable by any technology we have now or are in development of” is insulting and is displaying willful ignorance.
So is comparing it to crystals. I’m reporting your post for deliberately trolling.
We do not have these technologies now except in the way that having a lodestone meant that the Greeks had maglev trains.
You wrote: Again, perhaps the words “atomic level scan” were misleading to a pendant. I was punning on your typo. You might not read your own posts but the rest of us are forced to if we want to respond to and correct your absurd statements.
Moderator Note
Let’s both dial it back a notch, please. This is General Questions, not Great Debates. Let’s focus on things that can be factually cited.
I know it is scfi now and way beyond science level we have now :mad::mad::(:(:(:(may be in 100 years from now but could nanites repair damage organs caused by ice crystals.
Why do people have brain damage before they are cryogenically frozen?
Because they’re usually dying. That’s why people get frozen - they’re dying/dead and hope they can be resuscitated someday when we have better medical technology.
You can flash freeze them very quickly, but then they get brain damage from ice.
You can freeze them more slowly to avoid ice damage but then they get brain damage from lack of oxygen, on top of any other damage from the process.
Either way, you gotta fix 'em up before thawing them out.
No, it’s we have a miniature model of the train that levitates, perhaps only in 2 dimensions (maybe it’s held in place from slipping side to side, in the same way an AFM doesn’t currently scan in 3d), we have a drawing of a full size train, and we have a complete, peer reviewed scientific theory that says a full size train will work.
We also can see objects like trains whooshing around in nature, so we know that our theory is correct at a fundamental level.
We also are hard at work building the tools to build the tools that will eventually allow us to build full sized trains. And we know the cost of building them can be made low enough for our civilization to afford them.
And we know that if we ever get such “trains”, virtually all of our problems as mortal beings will be solved.
It takes a lot of guts to be willfully blind to all this.
This is the whole point of the concept of information theoretic death that Habeed mentioned upthread. You might be able to regenerate the organs, maybe even the brain, but at that point the original brain with the original memories and the original personality is gone.
Moderator Note
Just because someone disagrees with you does not make them ignorant, willfully blind, or trolling. When I said dial it back a notch, this is what you need to back away from.
What is theoretic death?
I think there are some things science has to answer first.
Where is memory stored or stored on and can it be repaired if there damage done.
What is dead or being dead.
What is concussion or make up you.
If all your memories are gone and some how they bring it back are you a copy? The person died and we have copy of person alive now?
Being dead is it your body being shut down or all you memories gone. That’s think of it this way it is year 2050 I get in car accident and get brain damage. Yes I’m alive but I don’t have any memories of my self or any thing. They give me new memories!! I died and copy of person.
If concussion is tied to memory.
There are people that get in car accident and part of their memory is gone if there is lot of brain damage.But we have no idea how to repair it. Never mind major brain damage.
I always strikes me that people that get themselves frozen have an astoundingly odd idea of what our descendants will make of vats full of bodies. Seems that they are more likely to suffer much the same fate as mummified cats as to be revived to live in an Arcadian future.
Yes people think because doctors freeze your body before complex surgery we are one step to cryogenically freezing people.
But if all your brain cells and memory die doing cryogenically freezing? Any advance star trek technology in 100 years from now to repair cell damage by ice crystals and reprinting memories will be point less.You died!! Now you got a copy person alive.
If memory is damage not lost there is hope. I can take painting and cut it into 50 slices and throw it on floor and reconstruct it:p:p Well it take me all day doing it by hand. The information is damage not lost. But if you write on it or put water on it well you cannot reconstruct it:eek::eek::eek: No matter how good you at doing puzzles. There no information to go on.
Also we still don’t know if a person memory and life experience = concussion.
If concussion dies = no memory and life experience.
So cryogenically freezing will have to keep the person concussion alive.
** Doctors are killing people doing complex surgery than bringing them back to life using freezing the brain. **
But here is the thing the person concussion is still there it not gone.
Will cryogenically freezing 
kill the person concussion? Because no matter what advanced technology there is in 50 or 100 years from now it will not matter if the person concussion is lost and cannot be bring back to life!! No matter if the person memory and brain cells can be reconstruct. If the person memory is damage not lost.
sweat209 : doctors aren’t freezing brains yet. They are cooling them.
While your writing style is difficult to read, you’re also correct that some forms of damage don’t actually disrupt the encoded information.
An example : with current methods, when the cryonics organizations freeze someone under perfect conditions, they still cannot avoid a few cracks forming in the brains once they cool them down to LN2 temperatures. The hope is, these cracks are so clean and predictable that they can be computationally reversed - once you have a scan of the brains, you just stitch the pieces back together. Very little information would be lost because there would only be one valid way to stitch a complex surface with many unique features on both sides of the crack back together.
How many times do we have to tell you that this isn’t true?