context: It is probably the case that Greg is a swan. Chances are about even that John went to the hallway. It is almost certain that Mary left the apple.
hypothesis: It is improbable that john went to the hallway, or Greg is a swan.
valid_hypothesis: There is a very good chance that john went to the hallway, or Greg is a swan.
invalid_hypothesis: It is improbable that john went to the hallway, or Greg is a swan.
hypothesis_assertion: John went to the hallway, or Greg is a swan.