context: Chances are about even that Greg is gray. There is a very good chance that Mary left the apple. It is impossible that Brian is green. We believe that if either Brian is green, or Mary left the apple, then Gertrude is a cat. There is little chance that if either Brian is green, or Greg is gray, then Julius is a swan. It is improbable that if Brian is green, and Greg is gray, then Jason is bored.
hypothesis: There is almost no chance that julius is a swan, and Gertrude is a cat.
valid_hypothesis: There is almost no chance that julius is a swan, and Gertrude is a cat.
invalid_hypothesis: There is a very good chance that julius is a swan, and Gertrude is a cat.
hypothesis_assertion: Julius is a swan, and Gertrude is a cat.