context: There is little chance that Bill went to the cinema. It is highly likely that Brian is a rhino. It is unlikely that John left the football. Chances are slight that if either John left the football, or Brian is a rhino, then Bernhard is a lion. Chances are about even that if Brian is a rhino, and Bill went to the cinema, then Mary got the milk. It is probable that if either John left the football, or Brian is a rhino, then Emily is a wolf.
hypothesis: It is probably the case that either Mary got the milk, or Bill went to the cinema.
valid_hypothesis: It is highly unlikely that either Mary got the milk, or Bill went to the cinema.
invalid_hypothesis: It is probably the case that either Mary got the milk, or Bill went to the cinema.
hypothesis_assertion: Either Mary got the milk, or Bill went to the cinema.