context: Chances are slight that Gertrude is a cat. It is impossible that Mary went to the hallway. We believe that Brian is a lion. It is unlikely that if Brian is a lion, or Mary went to the hallway, then Sumit is bored. It is almost certain that if either Mary went to the hallway, or Gertrude is a cat, then John put down the apple. It is likely that if Brian is a lion, and Mary went to the hallway, then Bernhard is a swan.
hypothesis: It is improbable that gertrude is a cat, or John put down the apple.
valid_hypothesis: It is improbable that gertrude is a cat, or John put down the apple.
invalid_hypothesis: It is almost certain that gertrude is a cat, or John put down the apple.
hypothesis_assertion: Gertrude is a cat, or John put down the apple.