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Aliens
Kindly assign a probability to each of the following being true (0-100%):
Intelligent extra-terrestrials have at some point visited earth - []
Intelligent extra-terrestrial life exists on earth - []
Intelligent extra-terrestrial life exists in the universe - []
Any extra-terrestrial life exists in the universe - []
Humans will discover concrete evidence of extra-terrestrial life this century - []
Humans will discover concrete evidence of intelligent extra-terrestrial life this century - []
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