context: There is a very good chance that Brian is a lion. It is probable that Julius is yellow. It is improbable that Sandra got the football.
hypothesis: It is impossible that brian is a lion, and Julius is yellow.
valid_hypothesis: There is a better than even chance that brian is a lion, and Julius is yellow.
invalid_hypothesis: It is impossible that brian is a lion, and Julius is yellow.
hypothesis_assertion: Brian is a lion, and Julius is yellow.