context: It is improbable that John went to the hallway. Chances are about even that Brian is a rhino. We believe that Jessica is a wolf. It is highly unlikely that if either John went to the hallway, or Jessica is a wolf, then Julius is a frog. We believe that if John went to the hallway, or Brian is a rhino, then Bernhard is yellow. It is probable that if John went to the hallway, and Jessica is a wolf, then Mary dropped the apple.
hypothesis: It is highly likely that mary dropped the apple, and Julius is a frog.
valid_hypothesis: It is impossible that mary dropped the apple, and Julius is a frog.
invalid_hypothesis: It is highly likely that mary dropped the apple, and Julius is a frog.
hypothesis_assertion: Mary dropped the apple, and Julius is a frog.