The point you're making seems to be that performing the repair is impossible in practice. Apart from that difficulty, do you think enough information is preserved in the location of all atoms in a cryopreserved brain, so that given detailed knowledge of how brains work in general this information would in theory be sufficient to reconstruct the initial person (even if this information is impractical to actually extract or process)? One possibility for avoiding the reconstruction of brains out of atoms is to instead reconstruct a Whole Brain Emulation of the original person. Do you think developing the technology of WBE is similarly impossible, or that there are analogous difficulties with use of WBE for this purpose?