As you bring the "math" into this, I already mentioned about the probabilities in another thread. Yea, you say that they have some invisibility suit, they avoid humans, etc.
But if there really are so much aliens, some surely want to be seen, "math proves it". If you stuff 100 different alien species in here, you mean that they are all like the same, behave the same, have the same goals, etc.?
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