A second scenario is that we could upload the patterns of an actual human into a suitable nonbiological, thinking substrate. A third, and the most compelling, scenario involves the gradual but inexorable progression of humans themselves from biological to nonbiological. That has already started with the benign introduction of devices such as neural implants to ameliorate disabilities and disease. It will progress with the introduction of nanobots in the bloodstream, which will be developed initially for medical and antiaging applications. Later more sophisticated nanobots will interface with
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