context: Chances are slight that Brian is gray. It is probably not the case that Greg is yellow. It is impossible that Mary dropped the milk.
hypothesis: There is a very good chance that brian is gray, and Mary dropped the milk.
valid_hypothesis: It is impossible that brian is gray, and Mary dropped the milk.
invalid_hypothesis: There is a very good chance that brian is gray, and Mary dropped the milk.
hypothesis_assertion: Brian is gray, and Mary dropped the milk.