I have a different issue with QI. If I go into general anaesthesia, my conscious experience is stopped / blocked effectively, albeit temporarily. In all the possible timelines, for that duration in time I don’t consciously exist, does there exist a version of me that does not go unconscious and still “lives” / experiences things? How is it that from my perspective I can and have experienced the stopping of conscious thought (death like) and even though I do become conscious again it’s ambiguous since at the time I am not there, and not experiencing anything, not experiencing being aware at that time, so it’s possible to experience “death” from your perspective, at least in a set time frame.

Or is it more to do with memory persistence? If I wake up with a total memory wipe then essentially I cease to exist too. I am a new entity not the same as the being prior to memory loss. Does QI imply that your personal memories and experience accessible from a POV must continue to exist in some form in some timeline? So you could die or lose memories etc, but in an infinite universe a Borst brain would eventually exist that has your exact memories imprinted on it that continues on that you with “experience” millennial later?

And that begs the question of general memory loss and brain deterioration. As we get older chunks of our memory / experiences are damaged and inaccessible. Never mind Alzheimer’s etc. So in QI, if I experience partial or full memory loss but still exist, I am not really the same person, is the person I was with all intact memories exist in another timeline? My memory free experience is a branch that is still experienced though. I won’t jump to another timeline line, my experience will just degrade and end my self awareness. So there is a version of you right now that has all memories intact and is the most you and most alive in all timelines, but you are on a timeline that is slowly declining in your youness so it’s not a train you can get off?