Consider the last option, that a million clones are made but the original is NOT destroyed. Further, the original never finds out about those clones. I can't see how that original person is the same person as the clones. They seem to be seperate incarnations. Further, their minds are not linked in any way. They share a memory (except the new ones they are forming as they continue to exist, perhaps an important point) but not a conciousness.
Seems to me memory is part of it and the actual being aware is another part, and that in order for someone else to be "me", they need to actually be connected to my conciousness.
The thought experiment I do is to actually think from the perspective of one of them. Doesn't matter who. I'd be looking AT the others, I could talk to them, but at no point would I see out one of the other clone's eyes or experience what it's like to be them, excepting the memories of past events. I can't reasonably conclude that those other me's are "me". I sure can conclude that this would completely break ownership laws though. Fortunatly, those are just a legal construct and don't really matter in terms of the identity theres.
Seems to me that the very instant there's two of me, each one is it's own person.
So the only question I have is, which one would be "me"? I've heard it said they all would, but again none of them are connected. They may all be copies of me perfectly, and I have no issue with that, but due to physical limitations I can only see out the eyes of one at a time, unless one is suggesting my "spirit" is connected through all of them. The only other thing that could be the case is to think of it as "fracturing and distributing" my awareness among them all, but that doesn't make much sense either, for the same reason.
Essentially, I'm stumped.
Let's introduce death into the equation. If one submits that yes, if you are killed but a perfect backup was made on death, and an irrelevent amount of time later a new body is created and your "mind" is dumped into the new brain, that new brain is you, you blink and you're in the future in a new body, then there's a small problem with the clone example I'll go into in a second. If however, one submits that no, when you die, even if a copy is made, that copy will be someone else with the exact same attributes, and from your perspective, there is nothing, no perspective, you are dead, the problem is clearly "what about the sleep between dreams or deep coma?. In that case, every time I wake up I'm a new existance and that person from yesterday is no more, but it sure doesn't feel like that at all and I've no reason to think that's true.
The problem with the first though is if you kill a clone. Let's say that a million clones are made of me, and I'm still around. If one states that ALL of them are equally "me", even though those minds aren't linked in any way and no matter what set of eyes you look out of, they can't ever know what the others are thinking, what happens if that "me" I picked is shot dead? Do I blink and I'm suddenly seeing out the eyes of a nearby clone? That sounds completely ridiculous to me, as it should. So, I'm stumped. The only resolution to this seems to be to accept that every single time we lose conciousness in life, when we wake back up, we're a new entity and losing conciousness is death of "an awareness", but again it doesn't feel like that's happening at all. That seems silly too.
Yeah, I'm still stumped.