context: Chances are about even that Lily is gray. It is probably the case that Brian is a swan. It is probably the case that Mary moved to the office.
hypothesis: It is probably not the case that mary moved to the office, and Lily is gray.
valid_hypothesis: It is probably not the case that mary moved to the office, and Lily is gray.
invalid_hypothesis: It is certain that mary moved to the office, and Lily is gray.
hypothesis_assertion: Mary moved to the office, and Lily is gray.