context: There is a very good chance that Mary moved to the office. It is almost certain that Brian is gray. We doubt that Greg is a lion.
hypothesis: It is unlikely that brian is gray, and Greg is a lion.
valid_hypothesis: It is unlikely that brian is gray, and Greg is a lion.
invalid_hypothesis: It is certain that brian is gray, and Greg is a lion.
hypothesis_assertion: Brian is gray, and Greg is a lion.