context: There is a better than even chance that Brian is a lion. There is a better than even chance that Bernhard is a swan. It is highly likely that Gertrude is a cat. Chances are about even that if Gertrude is a cat, or Bernhard is a swan, then Lily is gray. It is unlikely that if either Brian is a lion, or Bernhard is a swan, then Greg is gray. Chances are about even that if Brian is a lion, or Bernhard is a swan, then Fred went to the hallway.
hypothesis: It is almost certain that gertrude is a cat, or Lily is gray.
valid_hypothesis: It is almost certain that gertrude is a cat, or Lily is gray.
invalid_hypothesis: It is probably not the case that gertrude is a cat, or Lily is gray.
hypothesis_assertion: Gertrude is a cat, or Lily is gray.