context: There is a very good chance that Fred went to the hallway. Chances are slight that Bernhard is gray. There is almost no chance that Mary dropped the milk. It is unlikely that if either Bernhard is gray, or Fred went to the hallway, then Greg is a swan. We doubt that if either Mary dropped the milk, or Bernhard is gray, then John discarded the apple. Chances are slight that if Mary dropped the milk, or Bernhard is gray, then Lily is white.
hypothesis: Chances are slight that fred went to the hallway, and Bernhard is gray.
valid_hypothesis: Chances are slight that fred went to the hallway, and Bernhard is gray.
invalid_hypothesis: There is a very good chance that fred went to the hallway, and Bernhard is gray.
hypothesis_assertion: Fred went to the hallway, and Bernhard is gray.