On mental capacity

I felt on top of the discussion yesterday afternoon, but it's shot way ahead of me by midnight last night. I'll get into it more, but for now, this infant:











and this nine-year-old child:














are not mentally equivalent just because the medical determination is that the latter has the mental capacity of a three-month old baby. One has experienced nine years in the world, which may include nine years of memories and clearly does include nine years of consciousness, however different or limited from the consciousness which most of us know.