I don't understand the infinite multiverse theory.
If there are an infinite number of universes, there are an infinite number of universes that are slightly like our own, where I for example misspelled the word 'infinite' once, with that being the only difference.
If this is correct, then that means that there must be universes in which people can travel to other universes, because infinite possibilities. This would mean though, that in a certain universe, someone has travelled through multiverse-space to our universe and publicly peed on President Obama. But this didn't happen. How couldn't it have in an infinite number of universes?
I think I can see where my reasoning is faulty, but to not break my head on this I would like you all to point it out.
The big problem when talking about an infinite number of universes is that you can only really work with everything as a set, because everything contains an infinite number of variations, which themselves contain an infinite number of variations and so on. A single universe is too insignificant on the scale to be properly considered. What you are describing wouldn't be 'our' universe, per se.
-First, it would be the infinite set of universes where the laws of physics are as we know them.
-It would then be the infinite set of universes within that where the earth forms exactly as it has, and life developed exactly as it has.
-Then it would be the infinite set of universes within that where everybody who has ever lived, and will ever live, are as they are in our universe; and everything that ever has happened is precisely the same. <- This can be seen in a 'branching' timeline, where everything up until a certain point is the same on each line, yet after that point there is a change.
----Here we move into a set of universes that we aren't in (which is why it could theoretically have happened, or happen, while we haven't experienced it, yet which follow all of the previous constraints (and certainly, many more) up until this point: Time wouldn't necessarily have to be at the same 'point' relative to every universe though, that could be variable----
-Then it would be the infinite set of univeres where someone has travelled through multiverse space.
Then it would be the infinite set of univeres where the someone who has travelled through multiverse space is from a universe given a certain criteria.
-Then it would be the infinite set of universes where the someone who has travelled through multiverse space has publically urinated on Obama.
-Then it would be the infinite set of universes where the someone who has travelled through multiverses space has publically urinated on Obama in a specific instance.
It really depends on what sort of limitations are imposed on the idea of a multiverse though as this is ignoring that not necessarily everything may be able to happen. This is how I view it anyway.
EDIT: To clarify, this isn't necessarily the type of multiverse in the opening post, it's merely a response to your question about why we may not ever observe an individual from another universe, if an infinite number of universe exists. An infinite number of universes would have a traveller, but at the same time, an infinite number of universes would not.
Something that may help is that not every infinite is the same size, some are bigger than others.
http://en.wikipedia.org/wiki/Cardinality_of_the_continuum