context: It is almost certain that John dropped the apple. Chances are about even that Bernhard is green. There is a very good chance that Fred went to the hallway. It is unlikely that if Fred went to the hallway, or Bernhard is green, then Emily is a cat. It is probably not the case that if either John dropped the apple, or Bernhard is green, then Brian is a lion. It is probable that if Bernhard is green, or John dropped the apple, then Lily is a swan.
hypothesis: It is almost certain that either Fred went to the hallway, or Lily is a swan.
valid_hypothesis: Chances are about even that either Fred went to the hallway, or Lily is a swan.
invalid_hypothesis: It is almost certain that either Fred went to the hallway, or Lily is a swan.
hypothesis_assertion: Either Fred went to the hallway, or Lily is a swan.