True, except for the 5th dimension part. Our world, whether 3D, 4D, or whatever, is an infinite number of probable universes with an infinite number of probable futures.
Our world exists in a single universe. A single universe that exists alongside an infinite number of universes that represent every other probability.
Yes. And all of them together can also be looked at as one single giant all encompassing universe (multiverse?).
"Uni" is one. The multiverse is not just an infinite number of other probable universes, but also an infinite number of improbable universes. There is also an infinite number of possible universes and an infinite number of impossible universes.
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