context: It is unlikely that Bernhard is white. Chances are about even that John went to the hallway. It is likely that Sandra got the football. We believe that if either Sandra got the football, or John went to the hallway, then Greg is a lion. It is unlikely that if Bernhard is white, or John went to the hallway, then Mary picked up the milk. We doubt that if Bernhard is white, and Sandra got the football, then Brian is a frog.
hypothesis: It is certain that bernhard is white, or Greg is a lion.
valid_hypothesis: Chances are about even that bernhard is white, or Greg is a lion.
invalid_hypothesis: It is certain that bernhard is white, or Greg is a lion.
hypothesis_assertion: Bernhard is white, or Greg is a lion.