context: It is probable that Greg is green. We doubt that Lily is a swan. There is almost no chance that Mary picked up the apple. It is probably the case that if either Greg is green, or Lily is a swan, then Winona is a sheep. It is almost certain that if either Lily is a swan, or Greg is green, then Fred went to the kitchen. It is impossible that if Lily is a swan, or Greg is green, then Brian is a frog.
hypothesis: It is impossible that lily is a swan, and Brian is a frog.
valid_hypothesis: It is impossible that lily is a swan, and Brian is a frog.
invalid_hypothesis: It is certain that lily is a swan, and Brian is a frog.
hypothesis_assertion: Lily is a swan, and Brian is a frog.