context: There is a very good chance that Brian is a frog. It is certain that Sandra got the football. It is probably not the case that Bill went to the hallway.
hypothesis: We doubt that bill went to the hallway, and Brian is a frog.
valid_hypothesis: We doubt that bill went to the hallway, and Brian is a frog.
invalid_hypothesis: It is certain that bill went to the hallway, and Brian is a frog.
hypothesis_assertion: Bill went to the hallway, and Brian is a frog.