This convo has gone on for centuries at this point. The Brain in the Jar, the teleportation conundrum, Thesius’ ship, it’s all already been covered over and over. people like you still keep crawling out of the woodwork thinking you know better than every philosopher that already waxed over this problem ad nauseum.

Your ‘continuous self’ is just as worthless as a concept. The idea that your ‘sense of being the same person’ is being held together by being apart of your plumbing just as much of an illusion. It’s worthless.

To elaborate, you are not the brain. You are the observer, the thing which exists as a byproduct of the brain’s processes, perhaps even a process yourself within. There’s also plenty of times when you will lose time other than sleep, like concussions, getting blackout drunk, panic attacks, and after those times you have no memory of making decisions or acting in your own accord, but you were. You, the observer, were absent while the brain kept working. So where were you?

You act as though you’re sure you are still the same observer as the one who went to bed. That is completely unsubstantiated. You may have just been born into your body when you awoke today, and will only have until your body falls back asleep again before you cease to exist, replaced by another process that thinks itself is you.

And if ‘you’ one day woke up in a digital world, like our own, it’s you’d be none the wiser, because your self is simply a collection of processes and memories. It’s arbitrary. It’s all dust. There’s not some special ‘continuity’ that keeps you alive somehow.