context: It is impossible that Brian is yellow. There is a very good chance that John is in the hallway. We believe that Greg is a lion. It is likely that if either Brian is yellow, or Greg is a lion, then Emily is a cat. It is certain that if Greg is a lion, or John is in the hallway, then Lily is white. It is impossible that if Greg is a lion, or John is in the hallway, then Julius is a frog.
hypothesis: There is little chance that either John is in the hallway, or Brian is yellow.
valid_hypothesis: There is a very good chance that either John is in the hallway, or Brian is yellow.
invalid_hypothesis: There is little chance that either John is in the hallway, or Brian is yellow.
hypothesis_assertion: Either John is in the hallway, or Brian is yellow.