context: It is probably not the case that Lily is a lion. Chances are slight that Brian is gray. It is impossible that Mary grabbed the milk. It is probably not the case that if either Brian is gray, or Mary grabbed the milk, then Julius is a frog. It is probably not the case that if either Brian is gray, or Mary grabbed the milk, then Fred went to the garden. There is almost no chance that if either Mary grabbed the milk, or Brian is gray, then Emily is a wolf.
hypothesis: We believe that brian is gray, and Mary grabbed the milk.
valid_hypothesis: It is impossible that brian is gray, and Mary grabbed the milk.
invalid_hypothesis: We believe that brian is gray, and Mary grabbed the milk.
hypothesis_assertion: Brian is gray, and Mary grabbed the milk.