context: It is highly likely that John went to the hallway. It is impossible that Sandra left the apple. There is little chance that Brian is a lion. There is a better than even chance that if Sandra left the apple, and John went to the hallway, then Julius is gray. We doubt that if either Sandra left the apple, or John went to the hallway, then Bernhard is a rhino. It is unlikely that if Sandra left the apple, or John went to the hallway, then Bill dropped the milk.
hypothesis: Chances are slight that either John went to the hallway, or Sandra left the apple.
valid_hypothesis: It is highly likely that either John went to the hallway, or Sandra left the apple.
invalid_hypothesis: Chances are slight that either John went to the hallway, or Sandra left the apple.
hypothesis_assertion: Either John went to the hallway, or Sandra left the apple.