If the universe has always existed and conscious self-aware life forms have always been generative and evolvative (coined word) then the presence of intelligent life would have always been fact and it could be no other way. I can see how, in a sense, that could mean it is necessary but then it would be no more remarkable than the dust on wyddyr's key board, (assuming that has always been there ).For starters, 'that which cannot be otherwise'.
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