like the brain is literally encased in the body so how can it be separate? like if you go around licking lamp posts you’re going to pick up some germ that’s gonna make you feel like crap and you get insomnia or fever and your brain will definitely be impacted. and so you’ll have short temper and that’ll get you into trouble.
But if we cut the bridge between the two brain hemispheres that allows them to communicate with eachother - the corpus callosum - it still feels subjectively like “you” remain unchanged. Yet there are ways to communicate with each hemisphere independently, as shown in the so-called split-brain experiments. The findings show that the two hemispheres often give different answers to the same questions. They also show that if you tell the left hemisphere to perform an action and then ask the right hemisphere why it did it, the right side will invent an excuse. So the question is - which hemisphere are you?
My answer to that is that it’s neither - there is no “you.” The sense of there being a center to consciousness is an illusion. There’s only consciousness and its contents. If we could perfectly copy your brain, that copy would also subjectively feel like you.
You could replicate material but what animates it isn’t assured simply by replication of some material
There’s also theory that consciousness is radio wave that could find or caught by hosts. So maybe you just created a host.
Another theory is that everything is conscious to exist in the dimension of space time and well it can get deeper as to say none of this exists at all. Or is a simulation. We simply decide that replication =reality of the meaning we give it.