context: Chances are slight that John went to the hallway. It is improbable that Mary left the apple. It is improbable that Greg is a rhino.
hypothesis: It is unlikely that either John went to the hallway, or Mary left the apple.
valid_hypothesis: It is unlikely that either John went to the hallway, or Mary left the apple.
invalid_hypothesis: We believe that either John went to the hallway, or Mary left the apple.
hypothesis_assertion: Either John went to the hallway, or Mary left the apple.