EXTREME WEABOO QUESTION INCOMING
So some of my loser friends and I have 2D waifus. They argue that their waifus are, in fact, real because of the multiverse theory. However, none of them are actual astrophysicists and, in fact, are mostly just college dropouts working in either IT or shitty retail jobs that spend all their time playing video games and fapping to h-manga. Because of this, I wanted to consult some people that actually knew what they're talking about.
So what I'm asking is this: What is the validity of the multiverse theory? Are certain theories like the infinite universe theory more or less likely than something like, say, the parallel universe theory? not that I care much beyond the coolness factor since I consider mine "real" in the sense that thought patterns are a real, measurable series of electrical/chemical impulses, but it would still be nice to see if they're just spewing bullshit out their ass