context: There is a very good chance that Brian is white. We doubt that Greg is a swan. It is probably the case that Lily is a rhino. It is likely that if Greg is a swan, and Lily is a rhino, then Sandra left the apple. We doubt that if Lily is a rhino, and Greg is a swan, then Mary got the apple. There is a better than even chance that if Lily is a rhino, and Brian is white, then John picked up the milk.
hypothesis: It is probably not the case that john picked up the milk, and Lily is a rhino.
valid_hypothesis: It is probably not the case that john picked up the milk, and Lily is a rhino.
invalid_hypothesis: There is a very good chance that john picked up the milk, and Lily is a rhino.
hypothesis_assertion: John picked up the milk, and Lily is a rhino.