If aging is construed as a problem of error accumulation, then aging elimination is necessarily a problem of error correction. The errors which constitute aging have been established under the SENS program as the seven in number – namely death resistant cells, cell death without replacement, genetic and epigenetic mutation, mitochondrial DNA damage, extracellular cross-links, extracellular junk accumulation and intracellular junk accumulation.
The strategies for the repair of these types of damage involve removal, replacement (facilitated by such technologies as stem cell therapy, tissue engineering and organ transplantation) and/or repair. All of these strategies require – for their most efficacious implementations – a fine level of manipulation in the form of nanotechnology of some kind. In the case of the brain – the seat of identity – repair as opposed to replacement technology seems indispensable (though this does not rule out the utility of gradual removal and replacement). Aging elimination in its most potent form seems ultimately to require recourse to error correction. The prospect of mind uploading, though it cannot be dismissed as a possibility, seems to require the solution of problems which are beyond the physics and chemistry of correction (such as philosophical problems of identity and whether or not consciousness is substrate-dependent).
The feasibility of aging elimination as an issue of error correction is not hindered by any known law of physics (and it is inconceivable that it may be so hindered by the unknown). All seven errors of the SENS program resolve – on the finest scale – into undesirable chemical reactions. The correction of such error therefore translates to the reversal of these chemical reactions. The laws of chemical thermodynamics permits that all chemical reactions may be reversed under the singular requirement that the necessary energy be supplied for the reversal.
This is the fundamental argument for the feasibility of error correction in a biological system and consequently the fundamental argument for the attainability of aging elimination and the realization of radical life extension.