If true randomness exists, and every quantum event splits the universe into two real, alternative worlds, then it is unavoidable that multiple alternative pasts can lead to a single moment as well.
This is because, for each next moment to be truly indeterminate, some percentage of it must have come from information that did not exist in this moment.
Which means that the same percentage of now also did not come from our real past. ...And how do we tell which information came from this 'real' past, and which was stirred into the mix from quantum randomness? We can't.
This makes here-and-now a bastard of uncertain parentage, with no possible DNA test. For all the universes that can expand from this moment, just as many can collapse to it.
Wouldn't conservation of universes be cool? Next time you spawn off another world, say 'hasta la vista', because you just might see each other again.
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