Comment Re:Cryo-embalming (Score 1) 69
I suspect that a more fundamental problem is what you would need to preserve.
Embryos are clearly the easier case, being small and impressively good at using some sort of contextual cue system to elaborate an entire body plan from a little cell glob(including more or less graceful handling of cases like identical twins, where physical separation of the cell blob changes requirements dramatically and abruptly); but they are also the case that faces looser constraints. If an embryo manages to grow a brain that falls within expectations for humans it's mission successful. People may have preferences; but a fairly wide range of outcomes counts as normal. If you discard or damage too much the embryo simply won't work anymore; or you'll get ghastly malformations; but there are uncounted billions of hypothetical babies that would count as 'correct' results if you perturb the embryo just slightly.
If you are freezing an adult; you presumably want more. You want the rebuilt result to fall within the realm of being them. That appears to not require an exact copy(people have at least limited ability to handle cell death and replacement or knock a few synapses around without radical personality change most of the time; and a certain amount of forgetting is considered normal); but it is going to require some amount of fidelity that quite possibly wont' be available(depending on what killed them and how, and how quickly and successfully you froze them); and which cannot, in principle, be reconstructed if lost.
Essentially the (much harder because it's all fiddly biotech) equivalent of getting someone to go out and paint a landscape for you vs. getting someone to paint the picture that was damaged when your house burned down. The first task isn't trivial; but it's without theoretical issues and getting someone who can do it to do it is easy enough. The second isn't possible, full stop, in principle, even if you are building the thing atom by atom the information regarding what you want has been partially lost; though it is, potentially, something you could more or less convincingly/inoffensively fake; the way people do photoshop 'restoration' of damaged photos where the result is a lie; but a plausible one that looks better than the damage does.
The fraught ethics of neurally engineering someone until your client says that their personality, memories, and behavior 'seem right' is, of course, left as an exercise to the reader; along with the requisite neuropsychology.
Embryos are clearly the easier case, being small and impressively good at using some sort of contextual cue system to elaborate an entire body plan from a little cell glob(including more or less graceful handling of cases like identical twins, where physical separation of the cell blob changes requirements dramatically and abruptly); but they are also the case that faces looser constraints. If an embryo manages to grow a brain that falls within expectations for humans it's mission successful. People may have preferences; but a fairly wide range of outcomes counts as normal. If you discard or damage too much the embryo simply won't work anymore; or you'll get ghastly malformations; but there are uncounted billions of hypothetical babies that would count as 'correct' results if you perturb the embryo just slightly.
If you are freezing an adult; you presumably want more. You want the rebuilt result to fall within the realm of being them. That appears to not require an exact copy(people have at least limited ability to handle cell death and replacement or knock a few synapses around without radical personality change most of the time; and a certain amount of forgetting is considered normal); but it is going to require some amount of fidelity that quite possibly wont' be available(depending on what killed them and how, and how quickly and successfully you froze them); and which cannot, in principle, be reconstructed if lost.
Essentially the (much harder because it's all fiddly biotech) equivalent of getting someone to go out and paint a landscape for you vs. getting someone to paint the picture that was damaged when your house burned down. The first task isn't trivial; but it's without theoretical issues and getting someone who can do it to do it is easy enough. The second isn't possible, full stop, in principle, even if you are building the thing atom by atom the information regarding what you want has been partially lost; though it is, potentially, something you could more or less convincingly/inoffensively fake; the way people do photoshop 'restoration' of damaged photos where the result is a lie; but a plausible one that looks better than the damage does.
The fraught ethics of neurally engineering someone until your client says that their personality, memories, and behavior 'seem right' is, of course, left as an exercise to the reader; along with the requisite neuropsychology.
