context: It is probably the case that Mary went to the hallway. It is likely that Brian is a swan. Chances are about even that Bernhard is a lion.
hypothesis: It is certain that either Mary went to the hallway, or Brian is a swan.
valid_hypothesis: Chances are about even that either Mary went to the hallway, or Brian is a swan.
invalid_hypothesis: It is certain that either Mary went to the hallway, or Brian is a swan.
hypothesis_assertion: Either Mary went to the hallway, or Brian is a swan.