Recent advances in biotechnology now provide a pathway to producing living human bodies without the neural components that allow us to think, be aware, or feel pain. Many will find this possibility disturbing, but if researchers and policymakers can find a way to pull these technologies together, we may one day be able to create “spare” bodies, both human and nonhuman.
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Without even getting into philosophy of mind and that we don’t have an empirical definition of consciousness, so it’s impossible to tell for sure one of the clones is conscious or not, neuroscience doesn’t know for sure the anstomical boundaries of consciousness, either. As others have said, there seems to be more to perception and cognition than only brain matter.