context: It is impossible that Julius is white. We doubt that John left the football. It is improbable that Mary got the apple. It is probably the case that if Mary got the apple, and John left the football, then Gertrude is a cat. It is probably not the case that if Mary got the apple, and Julius is white, then Brian is gray. There is a better than even chance that if either Mary got the apple, or Julius is white, then Lily is a swan.
hypothesis: It is impossible that julius is white, and Mary got the apple.
valid_hypothesis: It is impossible that julius is white, and Mary got the apple.
invalid_hypothesis: It is likely that julius is white, and Mary got the apple.
hypothesis_assertion: Julius is white, and Mary got the apple.