context: We believe that Bernhard is yellow. There is a better than even chance that Julius is a lion. It is impossible that Brian is white.
hypothesis: It is impossible that julius is a lion, and Brian is white.
valid_hypothesis: It is impossible that julius is a lion, and Brian is white.
invalid_hypothesis: There is a better than even chance that julius is a lion, and Brian is white.
hypothesis_assertion: Julius is a lion, and Brian is white.