context: We doubt that Bill went to the bedroom. It is unlikely that Brian is a lion. It is probably the case that Lily is a frog. It is almost certain that if Brian is a lion, and Bill went to the bedroom, then John discarded the milk. There is a better than even chance that if Lily is a frog, or Bill went to the bedroom, then Julius is green. It is certain that if either Bill went to the bedroom, or Lily is a frog, then Mary dropped the milk.
hypothesis: Chances are about even that either Julius is green, or Bill went to the bedroom.
valid_hypothesis: Chances are about even that either Julius is green, or Bill went to the bedroom.
invalid_hypothesis: It is certain that either Julius is green, or Bill went to the bedroom.
hypothesis_assertion: Either Julius is green, or Bill went to the bedroom.