context: It is improbable that Brian is yellow. It is impossible that Lily is green. It is impossible that Julius is a rhino. We doubt that if Lily is green, or Brian is yellow, then Mary went to the kitchen. We doubt that if either Lily is green, or Julius is a rhino, then John moved to the office. There is a very good chance that if Lily is green, or Brian is yellow, then Greg is a swan.
hypothesis: It is impossible that julius is a rhino, and Greg is a swan.
valid_hypothesis: It is impossible that julius is a rhino, and Greg is a swan.
invalid_hypothesis: Chances are about even that julius is a rhino, and Greg is a swan.
hypothesis_assertion: Julius is a rhino, and Greg is a swan.