context: It is certain that Brian is a lion. Chances are about even that Greg is a rhino. It is certain that Lily is gray. There is a very good chance that if either Greg is a rhino, or Lily is gray, then John went to the hallway. There is almost no chance that if either Greg is a rhino, or Brian is a lion, then Mary got the milk. We doubt that if either Brian is a lion, or Lily is gray, then Daniel grabbed the apple.
hypothesis: It is highly likely that john went to the hallway, or Greg is a rhino.
valid_hypothesis: It is highly likely that john went to the hallway, or Greg is a rhino.
invalid_hypothesis: Chances are slight that john went to the hallway, or Greg is a rhino.
hypothesis_assertion: John went to the hallway, or Greg is a rhino.