context: Chances are slight that Sandra grabbed the milk. We doubt that John went to the office. It is impossible that Lily is white. We believe that if Sandra grabbed the milk, or Lily is white, then Emily is a wolf. It is almost certain that if John went to the office, and Lily is white, then Greg is a frog. It is probable that if Sandra grabbed the milk, or John went to the office, then Brian is a swan.
hypothesis: It is impossible that lily is white, and Greg is a frog.
valid_hypothesis: It is impossible that lily is white, and Greg is a frog.
invalid_hypothesis: It is probable that lily is white, and Greg is a frog.
hypothesis_assertion: Lily is white, and Greg is a frog.