Parallel universe : Anything that can happen will happen

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Parallel universe theory suggests that anything that can happen will occur in some alternate universe. However, this leads to contradictions regarding the number of parallel universes and the probabilities of events occurring. If the number of universes is determined by event possibilities, each event would require a different number of universes, which is implausible. Conversely, if the number of universes is fixed, it implies that all events have related probabilities, which is also unlikely. Ultimately, the discussion concludes that the concept of parallel universes lacks practical utility and may be overly complex compared to the idea of a single universe.
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According to parallel universe theory ( which as far as I know is not any different from string theory/ies ) anything that can happen will happen, if not here then in any other, parallel universe.

If "ANYTHING THAT CAN HAPPEN WILL HAPPEN IN ANY OF THE ALTERNATE UNIVERSE" were to be true it simply means that the either the no. of alternate universe is determined by the probability of the occurrence of an event or the probability of occurrence of an event is determined by the no. of alternate universe; cause each of possibility "HAS TO OCCUR".

But none of the above can be true as if "no. of alter. universe" is determined by the " no. of possibilities of occurrence of an event " than that would mean as for each and every "event" there r different no. of "possibilities" of "different outcomes" ; so for each and every "event" the "no. of parallel universe" will be "different", that does not seems to be true.

If we take second case that the "no. of para. universe" is "fixed" or even if increasing, than it is increasing according to some rule ( no matter how complex it be. ) and "no. of "possible outcomes" of different probability" is determined by them, than that would simply mean that "each and every EVENT" has Same probability ( or at least utterly related ) but for an "infinite" no. of events ( may be hypothetical ) to have same or completely related "probability of "no. of "possible outcomes" of different probability" " is surely way out.

So all these things doesn't simple say that this idea of " ALTERNATE ( or parallel ) UNIVERSE " should be ridiculed or this idea must be abandoned that " "Anything that can happen will happen in ..." .
 
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As far as I know, there's no parallel universe in which this post makes sense.

Parallel universe theories are useless. Ok there could be an infinite number of parallel universes with all outcomes, and they don't interact with each other OR there is only this universe. The latter seems simpler.
 
"Supernovae evidence for foundational change to cosmological models" https://arxiv.org/pdf/2412.15143 The paper claims: We compare the standard homogeneous cosmological model, i.e., spatially flat ΛCDM, and the timescape cosmology which invokes backreaction of inhomogeneities. Timescape, while statistically homogeneous and isotropic, departs from average Friedmann-Lemaître-Robertson-Walker evolution, and replaces dark energy by kinetic gravitational energy and its gradients, in explaining...

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