context: Chances are about even that Lily is yellow. We doubt that Julius is a swan. It is probably not the case that Sandra grabbed the milk.
hypothesis: It is certain that either Julius is a swan, or Lily is yellow.
valid_hypothesis: Chances are about even that either Julius is a swan, or Lily is yellow.
invalid_hypothesis: It is certain that either Julius is a swan, or Lily is yellow.
hypothesis_assertion: Either Julius is a swan, or Lily is yellow.