context: There is a very good chance that John left the football. It is certain that Brian is a lion. There is a very good chance that Greg is gray. It is certain that if either Greg is gray, or John left the football, then Antoine is hungry. It is probable that if either Greg is gray, or Brian is a lion, then Bernhard is a swan. It is certain that if John left the football, and Brian is a lion, then Lily is a frog.
hypothesis: We doubt that either Bernhard is a swan, or John left the football.
valid_hypothesis: It is likely that either Bernhard is a swan, or John left the football.
invalid_hypothesis: We doubt that either Bernhard is a swan, or John left the football.
hypothesis_assertion: Either Bernhard is a swan, or John left the football.