context: It is impossible that Mary went to the hallway. It is probable that Gertrude is a cat. It is highly unlikely that Greg is green. We doubt that if either Greg is green, or Gertrude is a cat, then Brian is a lion. It is improbable that if either Greg is green, or Mary went to the hallway, then Julius is a rhino. We believe that if Mary went to the hallway, and Greg is green, then Sandra got the apple.
hypothesis: It is improbable that either Brian is a lion, or Mary went to the hallway.
valid_hypothesis: It is improbable that either Brian is a lion, or Mary went to the hallway.
invalid_hypothesis: It is highly likely that either Brian is a lion, or Mary went to the hallway.
hypothesis_assertion: Either Brian is a lion, or Mary went to the hallway.