context: It is likely that Julius is gray. It is highly unlikely that Brian is a lion. It is impossible that Mary took the apple. We believe that if either Brian is a lion, or Julius is gray, then Bill is in the school. It is probably the case that if either Julius is gray, or Brian is a lion, then Sandra put down the milk. Chances are slight that if Mary took the apple, or Julius is gray, then John went to the office.
hypothesis: There is a better than even chance that john went to the office, and Brian is a lion.
valid_hypothesis: It is impossible that john went to the office, and Brian is a lion.
invalid_hypothesis: There is a better than even chance that john went to the office, and Brian is a lion.
hypothesis_assertion: John went to the office, and Brian is a lion.