context: Chances are slight that Greg is yellow. It is certain that Mary left the football. It is probably not the case that Bill went to the cinema.
hypothesis: We believe that either Bill went to the cinema, or Mary left the football.
valid_hypothesis: We believe that either Bill went to the cinema, or Mary left the football.
invalid_hypothesis: Chances are slight that either Bill went to the cinema, or Mary left the football.
hypothesis_assertion: Either Bill went to the cinema, or Mary left the football.