Funny that it's worded that way. Hubble volumes have nothing to do with it. We can see objects that are currently outside our Hubble volume, so clearly those objects have a causal influence on us.I want to discuss his first type (I won't give my opinion about the other three as this probably gets me in trouble...). In an infinite universe, so Tegmark conjectures, there are infinite Hubble volumes and in this infinity an infinite of exact copies of you and me exist. — Cornwell1
Fallicious reasoning. A given state (say current state of Earth) has a finite set of events in its past light cone, which was (as measured in proper distance) was merely the size of a grapefruit at the end of the inflation epoch, grew to a maximum proper size of nearly 6 billion light years around 7 billion years ago, and is today the size of Earth. By definition (and assuming cause and effect cannot happen faster than light), no event inside that past light cone can interact with an event inside that light cone.This can't be true because all Hubble volumes interact with their surroundings.
Yes, which is why Hubble volume is useless. It affect the thing at the edge of the Hubble volume, but it doesn't effect you, so it matters not. Use past light cone instead of Hubble volume, and the logic works.Suppose there is such a copy in a Hubble volume identical to the one we live in. How can this be? Near the border of our volume, there is interaction with stuff outside of the volume
No it doesn't. It might mean that the identical (arbitrary) volume evolves subsequently differently, but that has no effect on the existence of the copy of you already at the center.which creates a difference between our volume and the identical volume somewhere else.
Polls get you opinions. The above is logic, not opinion.Am I right or am I left?
Worth a poll?
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