context: There is little chance that Julius is a swan. We doubt that Brian is a lion. It is almost certain that Lily is gray.
hypothesis: We believe that lily is gray, and Julius is a swan.
valid_hypothesis: It is improbable that lily is gray, and Julius is a swan.
invalid_hypothesis: We believe that lily is gray, and Julius is a swan.
hypothesis_assertion: Lily is gray, and Julius is a swan.