context: We doubt that Daniel left the football. It is probably not the case that Mary went to the hallway. It is probably the case that Bernhard is a lion. It is probably not the case that if Bernhard is a lion, and Daniel left the football, then Gertrude is a mouse. It is likely that if Daniel left the football, and Mary went to the hallway, then Fred moved to the office. It is improbable that if either Mary went to the hallway, or Daniel left the football, then Brian is a swan.
hypothesis: We believe that bernhard is a lion, or Daniel left the football.
valid_hypothesis: We believe that bernhard is a lion, or Daniel left the football.
invalid_hypothesis: Chances are slight that bernhard is a lion, or Daniel left the football.
hypothesis_assertion: Bernhard is a lion, or Daniel left the football.