context: We believe that Julius is a lion. There is little chance that Bernhard is a swan. We doubt that Fred went to the hallway. It is likely that if either Fred went to the hallway, or Bernhard is a swan, then Greg is gray. There is a very good chance that if either Bernhard is a swan, or Fred went to the hallway, then Brian is white. Chances are slight that if Fred went to the hallway, or Bernhard is a swan, then Mary dropped the milk.
hypothesis: It is probably not the case that either Bernhard is a swan, or Fred went to the hallway.
valid_hypothesis: It is probably not the case that either Bernhard is a swan, or Fred went to the hallway.
invalid_hypothesis: It is probably the case that either Bernhard is a swan, or Fred went to the hallway.
hypothesis_assertion: Either Bernhard is a swan, or Fred went to the hallway.