I wonder if Scott is trying to make a misguided sort of pro-abortion political argument, the idea being that incubating one's "own" cells in a robot and considering it a legal person is absurd. Of course, this betrays a serious ignorance of biology: The cell involved in conception and pregnancy is a combination of cells from two people, and has its own DNA separate from the mother. So, from a philosophical standpoint at least, it is its own person. The only difference between you now and you when your mother conceived you is size: You are the same person. You didn't magically transform from being your mother to being your own self when you were born. If you were part of your mother, you wouldn't need a placenta to isolate the blood supplies. People instinctively realize this; those who want their pregnancies talk to their unborn babies, remark on what "they" do, attribute personalities to them, and basically treat them as they do when they are born except they happen to be confined in the mother temporarily.