My point is that 1 and 2 above don't seem to differ fundamentally in either of the two descriptors you used.
Conversations about definitions of words are not useful, but definitions of concepts are necessary. I'm pointing at the fuzziness because it indicates to me that the supposed distinction is not being made based on any principle, but simply to rationalize a preexisting bias.
I wasn't trying to present a principled distinction, or trying to avoid bias. What I was saying isn't something I'm going to defend. The only reason I responded to your criticism of it was that I was annoyed by the nature of your objection. However, since now I know you thought I was trying to say more than I actually was, I will freely ignore your objection.
A few years ago, I wrote a little dialogue I imagined between 2 materialists, one of whom was for and one against abortion, centering on the personal identity question. I recently cleaned it up and added a number of references for the biological claims.
You can read it at An Abortion Dialogue.
Early feedback from #lesswrong is that it's a 'nicely enjoyable read' and 'quite good'. I hope everyone likes it, even if it doesn't exactly break new philosophical ground.