context: We believe that Jeff went to the bedroom. Chances are slight that Sandra took the football. There is almost no chance that Lily is gray.
hypothesis: It is impossible that lily is gray, and Sandra took the football.
valid_hypothesis: It is impossible that lily is gray, and Sandra took the football.
invalid_hypothesis: It is likely that lily is gray, and Sandra took the football.
hypothesis_assertion: Lily is gray, and Sandra took the football.