Quote Originally Posted by ChezJ
to whoever suggested that anything is possible in an infinite universe, that is a load of bull. just because something is "infinite" (meaning endless) does not mean that it includes everything. for example the range of even numbers is "infinite" but it will never include any odd numbers no matter how far you go. the universe may or may not be infinite, but if it is, that has nothing to do with whether there is a clone of me in some parallel universe doing almost exactly what i'm doing right now.

ChezJ
The most eloquent way I ever heard this put forth was in an explanation of a theoritical encryption mechanism based on quantum theory. It was the point in the explanation where the author had to convey that a set could have an infinte number of members yet still not include all possible members. The quote was:

There are an infinte number of real numbers between 1 and 2; but none of them are the number 6.