context: It is probable that John went to the hallway. It is impossible that Brian is a lion. It is highly likely that Emily is a wolf.
hypothesis: It is impossible that john went to the hallway, and Brian is a lion.
valid_hypothesis: It is impossible that john went to the hallway, and Brian is a lion.
invalid_hypothesis: Chances are about even that john went to the hallway, and Brian is a lion.
hypothesis_assertion: John went to the hallway, and Brian is a lion.