Well, after you'd made a comment a while back about Lisa not having to deal with the Ship of Theseus problem, I pretty much guessed this is what would be happening.I was surprised that with all the images and comparisons people were throwing around to other series, and especially Gunnm, nobody brought up the topic of amnesia, even with brain damage being practically guaranteed.
Didn't bring it up because I remembered the salt about people wanting Lisa to live or die, and didn't want to start it back up again.