this is vaguely related to the string theory related post from a day or two ago, it's all bazinga science folks TL;DW string theory is a big thing because people that read pop science really liked it and it took a long time for physicists to come out in force and say "this is untestable garbage"
how is a multiverse any less testable than a single universe though? It seems to me there are “at least one” universes and narrowing down the “at least” part seems difficult
I'm no physicist, but I assume if a multiverse was easily testable within the confines of this universe, it wouldn't really count as a separate universe. :edgeworth-shrug:
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Theories depending on ever-more universes which cannot be observed at all by us are massively inelegant compared to ones with just our universe.