context: Chances are slight that Brian is a lion. It is probably not the case that Emily is a cat. We believe that Mary moved to the office. It is likely that if Emily is a cat, and Mary moved to the office, then Julius is white. There is almost no chance that if either Emily is a cat, or Brian is a lion, then John discarded the apple. It is probably not the case that if Brian is a lion, and Emily is a cat, then Daniel grabbed the milk.
hypothesis: It is unlikely that mary moved to the office, or Brian is a lion.
valid_hypothesis: There is a very good chance that mary moved to the office, or Brian is a lion.
invalid_hypothesis: It is unlikely that mary moved to the office, or Brian is a lion.
hypothesis_assertion: Mary moved to the office, or Brian is a lion.