context: It is probably the case that Sandra left the football. There is a very good chance that Lily is gray. It is unlikely that Jason is bored. It is unlikely that if Jason is bored, and Lily is gray, then Greg is a swan. There is almost no chance that if Lily is gray, and Sandra left the football, then Mary went to the garden. It is probable that if either Sandra left the football, or Lily is gray, then Julius is gray.
hypothesis: It is unlikely that either Lily is gray, or Julius is gray.
valid_hypothesis: We believe that either Lily is gray, or Julius is gray.
invalid_hypothesis: It is unlikely that either Lily is gray, or Julius is gray.
hypothesis_assertion: Either Lily is gray, or Julius is gray.