Two of our planet’s leading astrophysicists say it’s time to get serious about aliens: Adam Frank of the University of Rochester and Andrew Siemion, director of the U of California Berkeley SETI Research Center, who wrote in an email that “I suspect there are other intelligent civilizations in the Milky Way – we just need to look!” But, asks Frank, will they, or have they, survived their Anthropocene bottleneck?
Y yes that's the subject, and hence the answer to the riddle of the 'reasons'. If we find one I would give astronomical odds, at least 100 to 1 that it will be near, no need to journey to a star. By near I mean less than 100 au. Pluto is about 40 au from the sun star.
So my bet is a penny, if I lose I will owe a $ to someone!
I don't believe in empirical science. I only believe in a priori truth....Kurt Gödel