context: It is certain that John got the milk. It is impossible that Bernhard is a lion. It is highly likely that Brian is white.
hypothesis: It is impossible that bernhard is a lion, and John got the milk.
valid_hypothesis: It is impossible that bernhard is a lion, and John got the milk.
invalid_hypothesis: We believe that bernhard is a lion, and John got the milk.
hypothesis_assertion: Bernhard is a lion, and John got the milk.