context: Chances are slight that Lily is gray. We believe that Brian is a frog. There is a better than even chance that Greg is a swan. We doubt that if Brian is a frog, or Lily is gray, then Mary moved to the office. There is a very good chance that if either Lily is gray, or Greg is a swan, then Sandra took the football. It is impossible that if Brian is a frog, and Lily is gray, then John went to the bedroom.
hypothesis: It is highly unlikely that greg is a swan, and Lily is gray.
valid_hypothesis: It is highly unlikely that greg is a swan, and Lily is gray.
invalid_hypothesis: We believe that greg is a swan, and Lily is gray.
hypothesis_assertion: Greg is a swan, and Lily is gray.