context: It is highly unlikely that Sandra grabbed the milk. We doubt that Fred went to the cinema. It is unlikely that John left the football. It is unlikely that if John left the football, or Sandra grabbed the milk, then Bernhard is a rhino. We doubt that if Sandra grabbed the milk, and Fred went to the cinema, then Julius is white. Chances are slight that if either Sandra grabbed the milk, or Fred went to the cinema, then Brian is a frog.
hypothesis: It is probably the case that bernhard is a rhino, and Fred went to the cinema.
valid_hypothesis: It is impossible that bernhard is a rhino, and Fred went to the cinema.
invalid_hypothesis: It is probably the case that bernhard is a rhino, and Fred went to the cinema.
hypothesis_assertion: Bernhard is a rhino, and Fred went to the cinema.