Note the big "if", and then the big 'if' conclusion.:-"So although we may not be able to directly observe any of these other universes, their existence seems to be logically required "if" our model building is on the right track. The anthropic cosmological principle is not something derivable from inside Big Bang theory at all. It merely represents a selection effect that we apply to all the possible universes in the multiverse to find the one we actually live in!"-http://www.huffingtonpost.com/dr-sten-odenwald/the-multiverse-explained-or-not_b_5196433.html?utm_hp_ref=science-How can folks think like this?