“Demanding that cryonicists produce a successful revival before you’ll credit the possibility of cryonics, is logically rude; specifically, it is a demand for particular proof.
A successful cryonics revival performed with modern-day technology is not a piece of evidence you could possibly expect modern cryonicists to provide, even given that the proposition of interest is true. The whole point of cryonics is as an ambulance ride to the future; to take advantage of the asymmetry between the technology needed to successfully preserve a patient (cryoprotectants, liquid nitrogen storage) and the technology needed to revive a patient (probably molecular nanotechnology).
Given that you don’t currently have molecular nanotechnology, you can’t reasonably expect to revive a cryonics patient today even given that they could in fact be revived using future molecular nanotechnology.
You are entitled to arguments, though not that particular proof, and cryonicists have done their best to provide you with whatever evidence can be obtained. For example:
A study on rat hippocampal slices showed that it is possible for vitrified slices cooled to a solid state at −130ºC to have viability upon re-warming comparable to that of control slices that had not been vitrified or cryopreserved. Ultrastructure of the CA1 region (the region of the brain most vulnerable to ischemic damage) of the re-warmed slices is seen to be quite well preserved compared to the ultrastructure of control CA1 tissue (24). Cryonics organizations perfuse brains with vitrification solution until saturation is achieved...
A rabbit kidney has been vitrified, cooled to −135ºC, re-warmed and transplanted into a rabbit. The formerly vitrified transplant functioned well enough as the sole kidney to keep the rabbit alive indefinitely (25)… The vitrification mixture used in preserving the rabbit kidney is known as M22. M22 is used by the cryonics organization Alcor for vitrifying cryonics subjects. Perfusion of rabbits with M22 has been shown to preserve brain ultrastructure without ice formation (26).”
There is a relatively concise rebuttal of this statement in “demands for particular proof”, which I quote:
“Demanding that cryonicists produce a successful revival before you’ll credit the possibility of cryonics, is logically rude; specifically, it is a demand for particular proof.
A successful cryonics revival performed with modern-day technology is not a piece of evidence you could possibly expect modern cryonicists to provide, even given that the proposition of interest is true. The whole point of cryonics is as an ambulance ride to the future; to take advantage of the asymmetry between the technology needed to successfully preserve a patient (cryoprotectants, liquid nitrogen storage) and the technology needed to revive a patient (probably molecular nanotechnology).
Given that you don’t currently have molecular nanotechnology, you can’t reasonably expect to revive a cryonics patient today even given that they could in fact be revived using future molecular nanotechnology.
You are entitled to arguments, though not that particular proof, and cryonicists have done their best to provide you with whatever evidence can be obtained. For example:
A study on rat hippocampal slices showed that it is possible for vitrified slices cooled to a solid state at −130ºC to have viability upon re-warming comparable to that of control slices that had not been vitrified or cryopreserved. Ultrastructure of the CA1 region (the region of the brain most vulnerable to ischemic damage) of the re-warmed slices is seen to be quite well preserved compared to the ultrastructure of control CA1 tissue (24). Cryonics organizations perfuse brains with vitrification solution until saturation is achieved...
A rabbit kidney has been vitrified, cooled to −135ºC, re-warmed and transplanted into a rabbit. The formerly vitrified transplant functioned well enough as the sole kidney to keep the rabbit alive indefinitely (25)… The vitrification mixture used in preserving the rabbit kidney is known as M22. M22 is used by the cryonics organization Alcor for vitrifying cryonics subjects. Perfusion of rabbits with M22 has been shown to preserve brain ultrastructure without ice formation (26).”