context: It is likely that Lily is green. There is a better than even chance that Julius is gray. It is impossible that Brian is white. There is almost no chance that if either Brian is white, or Julius is gray, then Fred went to the garden. It is probably not the case that if either Julius is gray, or Brian is white, then Sandra grabbed the milk. It is impossible that if Julius is gray, or Lily is green, then Mary took the apple.
hypothesis: It is impossible that sandra grabbed the milk, and Fred went to the garden.
valid_hypothesis: It is impossible that sandra grabbed the milk, and Fred went to the garden.
invalid_hypothesis: Chances are about even that sandra grabbed the milk, and Fred went to the garden.
hypothesis_assertion: Sandra grabbed the milk, and Fred went to the garden.