context: Chances are about even that Sandra grabbed the apple. There is a better than even chance that Lily is gray. Chances are slight that Brian is green. There is almost no chance that if either Lily is gray, or Sandra grabbed the apple, then Emily is a mouse. There is almost no chance that if either Brian is green, or Sandra grabbed the apple, then Mary got the milk. It is impossible that if Sandra grabbed the apple, and Brian is green, then Bill is in the school.
hypothesis: It is highly likely that lily is gray, and Bill is in the school.
valid_hypothesis: It is impossible that lily is gray, and Bill is in the school.
invalid_hypothesis: It is highly likely that lily is gray, and Bill is in the school.
hypothesis_assertion: Lily is gray, and Bill is in the school.