Many things that seem intuitively clear turn out not to be true. I don't know if my "alien clone" would share a consciousness with me and you don't know either.

Many things that seem intuitively clear turn out not to be true. I don't know if my "alien clone" would share a consciousness with me and you don't know either. It's not even clear if split brain patients (people with brain hemispheres that do not communicate or very inefficiently communicate with each-other) can be said to have a single consciousness or two consciousnesses or something else entirely.