context: It is highly unlikely that Sandra left the apple. It is certain that John is in the hallway. We believe that Mary went to the office. There is almost no chance that if John is in the hallway, and Mary went to the office, then Brian is gray. We believe that if Sandra left the apple, or John is in the hallway, then Julius is a swan. It is almost certain that if Mary went to the office, and John is in the hallway, then Lily is a rhino.
hypothesis: It is unlikely that brian is gray, or Julius is a swan.
valid_hypothesis: We believe that brian is gray, or Julius is a swan.
invalid_hypothesis: It is unlikely that brian is gray, or Julius is a swan.
hypothesis_assertion: Brian is gray, or Julius is a swan.