context: Chances are slight that Sandra left the milk. We doubt that Brian is a lion. There is a very good chance that Lily is yellow. We believe that if Brian is a lion, or Sandra left the milk, then Julius is a swan. Chances are about even that if either Sandra left the milk, or Brian is a lion, then John moved to the office. There is almost no chance that if Lily is yellow, or Brian is a lion, then Gertrude is a wolf.
hypothesis: It is probably not the case that sandra left the milk, or Julius is a swan.
valid_hypothesis: It is probably not the case that sandra left the milk, or Julius is a swan.
invalid_hypothesis: It is almost certain that sandra left the milk, or Julius is a swan.
hypothesis_assertion: Sandra left the milk, or Julius is a swan.