context: There is little chance that Jeff went to the hallway. It is highly unlikely that Lily is a swan. It is unlikely that Sandra grabbed the apple.
hypothesis: It is impossible that lily is a swan, and Jeff went to the hallway.
valid_hypothesis: It is impossible that lily is a swan, and Jeff went to the hallway.
invalid_hypothesis: We believe that lily is a swan, and Jeff went to the hallway.
hypothesis_assertion: Lily is a swan, and Jeff went to the hallway.