Substrate is morally irrelevant, assuming it doesn’t affect functionality or consciousness. It doesn’t matter, from a moral point of view, whether somebody runs on silicon or biological neurons (just as it doesn’t matter whether you have dark or pale skin). On the same grounds, that we reject racism and speciesism, we should also reject carbon-chauvinism, or bioism. —NICK BOSTROM, “ETHICS FOR INTELLIGENT MACHINES: A PROPOSAL, 2001”
