context: It is improbable that Lily is white. Chances are about even that Brian is a lion. There is a better than even chance that John dropped the apple. There is a very good chance that if either Lily is white, or John dropped the apple, then Greg is yellow. Chances are about even that if Brian is a lion, or John dropped the apple, then Daniel left the football. It is impossible that if either Brian is a lion, or Lily is white, then Mary went to the garden.
hypothesis: There is a better than even chance that lily is white, and Brian is a lion.
valid_hypothesis: It is highly unlikely that lily is white, and Brian is a lion.
invalid_hypothesis: There is a better than even chance that lily is white, and Brian is a lion.
hypothesis_assertion: Lily is white, and Brian is a lion.