context: We believe that Bill is in the school. Chances are slight that Bernhard is a lion. There is a better than even chance that Brian is white. It is likely that if Bernhard is a lion, and Bill is in the school, then Jessica is a cat. It is likely that if Brian is white, and Bill is in the school, then Sandra got the football. It is probably the case that if Brian is white, or Bernhard is a lion, then Greg is a lion.
hypothesis: It is probably not the case that either Bernhard is a lion, or Bill is in the school.
valid_hypothesis: It is probably the case that either Bernhard is a lion, or Bill is in the school.
invalid_hypothesis: It is probably not the case that either Bernhard is a lion, or Bill is in the school.
hypothesis_assertion: Either Bernhard is a lion, or Bill is in the school.