context: It is improbable that Brian is a lion. It is impossible that Greg is a rhino. We believe that John went to the hallway. It is unlikely that if Greg is a rhino, and John went to the hallway, then Sandra left the football. It is likely that if either Greg is a rhino, or Brian is a lion, then Bernhard is white. It is unlikely that if either John went to the hallway, or Brian is a lion, then Mary picked up the apple.
hypothesis: It is unlikely that mary picked up the apple, or Bernhard is white.
valid_hypothesis: It is unlikely that mary picked up the apple, or Bernhard is white.
invalid_hypothesis: It is certain that mary picked up the apple, or Bernhard is white.
hypothesis_assertion: Mary picked up the apple, or Bernhard is white.