If "personhood" is the quality that entitles a human to life, and "personhood" hinges on sentinence, the comatose and the fetus have the same condition--potential for sentinence. This potential is considerably higher in the fetus. Kill the comatose, and they don't know what they're missing. Literally. The same as the fetus.
I guess neither of us will budge on the comatose vs. 1 week old zygote issue, so I propose we move on.
Question for you: Why do you believe that a human's life is more precious than say a dolphin's, a cow's, or even an insect?
I know that living humans, whether comatose, retarded, sleeping, or fetal have an inherent right to not be hacked to death. Because of humanity.
What, preciesely, do you mean by "humanity"? Are you referring to the mere quality of being a member of the homo sapiens species? Or is there something else that makes human life precious (or more precious than any other life)? If so, why?
EDIT:
I'd like to clarify that I personally believe a human's life is worth more than an animal or other being. I just want to explore why you believe it, in an effort to figure out where my reasons differ from yours. I believe we hold a difference of opinion in this area and it would be interesting to explore it.
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