In any case, as this bit by bit exchange occurs, if A is changed into B, but A is kept as the model, or not, after a duration of X time, the fact is A will = B. They will be indistinguishable. The plasticity surrounding the conversion will require closer and closer approximation to the original, and the plasticity (the appearance) of the simulacra will have to become progressively resembling the original. (the sell) Therefore, the requirement is that B will become the exact duplicate of A. In that case, no difference will be observed, except at the time of creation,termination, but this too, will have to be dealt with when the time comes. Only a very few, top ‘CREATORS’ will really know this technique, for fear of subversion and other issues, and as the technology becomes unreachable progressively, the synthetic-creator will replace the human one.
Now here enters an interesting scenario. A virtually indistinguishable plastic=fantastic Descartes will question the EVIL GENIUS as to the feasibility of the very synthesis of man and machine as a certainty. and a super philosophy may inquire of the possibility that eternal return is simply this/ the CREATION of the simulacra of the dual nature of reality.
By an eternal CREATOR.
I would like to pre-empt a foreseeable objection about the conceivability of creation,termination. In the beginning…the commercial development, marketing, and sales of such ‘products’ will be exceedingly high. As capitalistic supply and demand curves begin to slope into more affordable areas, the usual development and sales figures will jump significantly. The previous super wealthy, will, use life extension, also on a progressive scale, to justify their bit by bit conversion, until they do not recognize, that ultimately, their most private parts will also need to be replaced. By this time, the costs will be enormous, but as with all newly created products, it will again become more reasonable, as other wealthy, as usually ,loose their fortunes, and cheaper products will need to be developed to deal with the newly emerging markets of those with the need for these types of products, but with affordability issues. By these times the creators may instill a program requirement of non recognition, or the purchasers may not recognize themselves.