# Parallel universe and Infinite monkey theorem [closed]

Is the Infinite monkey theorem helpful for determining the existence of the very same our universe somewhere else?

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## closed as not constructive by Sklivvz♦, Manishearth♦Dec 29 '12 at 21:27

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I've once read a popular article wherein serious cosmologists were applying this theorem (although the name was not explicitely mentioned) to investigate if things we can observe inside our cosmic horizon could be repeated in our universe outside the cosmic horizon. I think when considering the question in such a context, it is legitimate and does not need to be closed. But maybe @Inquisitive you could clarify the context a little bit? – Dilaton Dec 29 '12 at 11:35
This is rather open-ended in its current form. (as well as being about fictional physics, and not really clear) Please see the don't ask section of the faq. – Manishearth Dec 29 '12 at 21:27

The basic idea is that if you take some system (e.g. your mother in law) containing $n$ Planck volumes then the maximum number of configurations of this system is 2$^n$. So you need to look at about 2$^n$ such volumes to stand a reasonable chance of finding a duplicate of your mother in law. This is the origin of claims that an exact copy of the Earth must exist if you take a big enough region of the universe. Whether such claims have any physical validity is open to debate.