Mostly, it’s conjecture:
Just about every explanation of how the “alternate universe” theory works describes a sort of bifurcation between two universes that resolve quantum events in different ways, as if the single event creates two completely disjoint universes. I would suggest that there are any number of intersecting and overlapping sets of events that seem like universes from the viewpoint of those perceiving them. After all, at the quantum level, it’s not the events that are perceived (as I understand it) as much as it is the outcomes. As events are perceived from different trajectories from different viewpoints (in this case, from different points of view)…
Damn. I’m not really finding the words. There was a bunch more that I had, including a concept of “Conservation of Events,” in which points of resolution would be distributed amongst possible “continuum sets,” but either my vocabulary isn’t big enough or I’ve forgotten part of the images that came to me this morning.
Suffice to say, though, it’s ingenious. If you’re a quantum physicist, perhaps you can help me figure out what I’m trying to say about event clouds and such. Argh. I’ll try to return to this when I can figure out what I was imagining this morning.