context: It is highly likely that Sandra grabbed the milk. There is almost no chance that Julius is a lion. It is highly unlikely that Lily is yellow.
hypothesis: It is impossible that julius is a lion, and Lily is yellow.
valid_hypothesis: It is impossible that julius is a lion, and Lily is yellow.
invalid_hypothesis: Chances are about even that julius is a lion, and Lily is yellow.
hypothesis_assertion: Julius is a lion, and Lily is yellow.