"Probable" and "unlikely" are antonyms. It can't be unlikely and probable.
edit: The level of likeliness should affect the amount of effort put into testing the hypothesis. I'd like an explanation from them on why they think the Wow! signal is so rare if a comet is the explanation - NASA says there might be as many as a hundred billion comets in the solar system, so "where's the rest of their signals" is a legit criticism.
edit: The level of likeliness should affect the amount of effort put into testing the hypothesis. I'd like an explanation from them on why they think the Wow! signal is so rare if a comet is the explanation - NASA says there might be as many as a hundred billion comets in the solar system, so "where's the rest of their signals" is a legit criticism.