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