context: It is probable that Julius is a swan. There is almost no chance that Daniel took the football. It is highly likely that Mary put down the milk. It is unlikely that if Julius is a swan, or Daniel took the football, then Bernhard is a lion. It is highly unlikely that if Daniel took the football, or Mary put down the milk, then Lily is yellow. Chances are about even that if either Julius is a swan, or Daniel took the football, then Brian is yellow.
hypothesis: We doubt that either Lily is yellow, or Bernhard is a lion.
valid_hypothesis: We doubt that either Lily is yellow, or Bernhard is a lion.
invalid_hypothesis: It is likely that either Lily is yellow, or Bernhard is a lion.
hypothesis_assertion: Either Lily is yellow, or Bernhard is a lion.