context: We believe that Fred moved to the office. Chances are about even that Bernhard is green. It is unlikely that Daniel put down the milk. We doubt that if Fred moved to the office, and Bernhard is green, then Gertrude is a wolf. It is impossible that if Bernhard is green, and Fred moved to the office, then Brian is gray. Chances are slight that if either Bernhard is green, or Daniel put down the milk, then Mary went to the garden.
hypothesis: It is impossible that brian is gray, and Daniel put down the milk.
valid_hypothesis: It is impossible that brian is gray, and Daniel put down the milk.
invalid_hypothesis: It is almost certain that brian is gray, and Daniel put down the milk.
hypothesis_assertion: Brian is gray, and Daniel put down the milk.