There ( above ) we get into the notion of self-awareness, which is yet another related but different concept, and in this discussion, the nuances are everything. Fortunately, with consciousness being fundamental, we can apply the same filter and say that given that consciousness is our experience of being in world, then self-awareness is the experience of one's self — something different than other selves ( like Mom & Dad ). We could probably place this safely between fundamental consciousness and the general sort of awareness we touched on earlier.
Again, however, although interesting, it's still not relevant to the point of the essay, which is the idea of continuity of personhood and all that entails. From that perspective we can ascertain facts ( not opinions ). For example, we can determine that it is a fact that Jane's biological sex is female, that she is about 5' 9" tall, weighs about 115 LBS, has green eyes, perfect teeth, unique fingerprints, unique voice, unique DNA, and we can go on and on establishing dozens of facts about her that all together — if on record — would establish as a fact ( not an opinion ) that she is who she claims to be if she loses her driver's licence.
This is where the afterlife believers try to claim that all that material stuff that proves you are
you doesn't really matter. They offhandedly dismiss it without considering the consequences. But there are consequences. All that stuff has to somehow follow Jane into this afterworld in order for anyone to recognize her. Without it, there is no way prove she is who she claims to be. What's more, that evidence is now a few handfuls of ash in an urn by the window. So what then has taken over for all that in this supposed afterworld?
But wait the afterworld believers cry! Jane could just be a disembodied glowing ball of light and still be Jane!
Really? That's a bit of a stretch. The Jane I know isn't a glowing ball of light.
But it acts like Jane! they counter.
Really - I liked the way Jane walked. Let's see it do that.
But it has Jane's memories! they counter
So what? Memory transferrence isn't a continuity of personhood. I can transfer memory from my computer A to your computer B. Is your computer now my computer? No
But it has Janes personality! they add.
And so did Marjorie Prime have Majories personality ( see trailer below and watch it if you haven't seen it ).
What this really reminds me of is when Kirk's ship gets hijacked to go vist God, and Kirk steps up and starts asking questions nobody wants to hear. Just keep reflecting on these questions. Ask some of your own, and eventually you'll arrive at the same place. Jane is dead and whatever this afterworld version is can only be some sort of copy. In most reports of the phenomena, they're not very good copies either.