context: There is a better than even chance that Sandra got the football. It is impossible that Julius is a swan. It is certain that John went to the hallway.
hypothesis: It is impossible that john went to the hallway, and Julius is a swan.
valid_hypothesis: It is impossible that john went to the hallway, and Julius is a swan.
invalid_hypothesis: We believe that john went to the hallway, and Julius is a swan.
hypothesis_assertion: John went to the hallway, and Julius is a swan.