context: We doubt that Brian is green. There is a better than even chance that Mary left the apple. Chances are slight that John went to the hallway. Chances are about even that if Mary left the apple, and Brian is green, then Greg is gray. It is certain that if Brian is green, or John went to the hallway, then Lily is a lion. It is highly unlikely that if John went to the hallway, or Mary left the apple, then Bill is in the school.
hypothesis: We doubt that lily is a lion, and Mary left the apple.
valid_hypothesis: We doubt that lily is a lion, and Mary left the apple.
invalid_hypothesis: There is a very good chance that lily is a lion, and Mary left the apple.
hypothesis_assertion: Lily is a lion, and Mary left the apple.