context: Chances are slight that Bill is in the school. It is probably the case that Brian is a lion. Chances are slight that Bernhard is gray.
hypothesis: There is almost no chance that bernhard is gray, and Bill is in the school.
valid_hypothesis: There is almost no chance that bernhard is gray, and Bill is in the school.
invalid_hypothesis: It is probable that bernhard is gray, and Bill is in the school.
hypothesis_assertion: Bernhard is gray, and Bill is in the school.