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At this point, all opinions how common or rare extraterristrial life is, intelligent ET life, and technologically advanced ET life is, and howrare or common earth-like planets are, are all speculation.
Another thing to consider is that all man-made radio transmisions are less than 100 years old. This means that unless technologocally advanced ETs are with 100 light years, or have some sort of listening post that converts electromagnetic transmissions to sub-space communicaitons or whatever (to borrow pure sci-fi term from Star Trek), the ETs don't know about us.
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