>>8
Might not be impossible if you consider a concept like an ``universal mind'', but you'd have to "provide irrefutable proof" (haha, no) that no countably infinite histories exist for some people if you want to make the timeline linear. In a way, it might be possible if you allow forgetting or amensia (up to zero knowledge), but while that can make sense, it's not very useful: I do know that, you(
>>8) and me(
>>7) don't share the same body/brain/memories/..., thus we are different people, thus 'you' (
>>8) are not 'me'(
>>7). So while there's no way to know if we don't share some "universal mind" (if total amnesia is allowed), I do know for certain that at this point in time, we don't share body/brain/memories, and for all practical purposes we're different people.