context: It is probably not the case that John went to the hallway. It is certain that Brian is green. It is probable that Julius is a swan. There is almost no chance that if Julius is a swan, or Brian is green, then Greg is a lion. It is probably the case that if Julius is a swan, and Brian is green, then Bernhard is gray. It is unlikely that if Julius is a swan, or John went to the hallway, then Lily is white.
hypothesis: It is impossible that either John went to the hallway, or Bernhard is gray.
valid_hypothesis: Chances are about even that either John went to the hallway, or Bernhard is gray.
invalid_hypothesis: It is impossible that either John went to the hallway, or Bernhard is gray.
hypothesis_assertion: Either John went to the hallway, or Bernhard is gray.