context: Chances are slight that Mary went to the hallway. It is highly unlikely that Brian is a swan. It is almost certain that Bernhard is a lion. It is certain that if either Bernhard is a lion, or Brian is a swan, then Gertrude is a sheep. We believe that if either Bernhard is a lion, or Mary went to the hallway, then Lily is green. There is a better than even chance that if either Bernhard is a lion, or Mary went to the hallway, then Sandra grabbed the milk.
hypothesis: It is improbable that either Mary went to the hallway, or Gertrude is a sheep.
valid_hypothesis: There is a very good chance that either Mary went to the hallway, or Gertrude is a sheep.
invalid_hypothesis: It is improbable that either Mary went to the hallway, or Gertrude is a sheep.
hypothesis_assertion: Either Mary went to the hallway, or Gertrude is a sheep.