context: There is a better than even chance that John went to the hallway. There is a better than even chance that Brian is gray. It is probably not the case that Greg is a swan. It is highly unlikely that if Greg is a swan, and Brian is gray, then Julius is green. Chances are slight that if Greg is a swan, or Brian is gray, then Mary dropped the apple. It is probably not the case that if Greg is a swan, and John went to the hallway, then Lily is a frog.
hypothesis: Chances are slight that john went to the hallway, and Greg is a swan.
valid_hypothesis: Chances are slight that john went to the hallway, and Greg is a swan.
invalid_hypothesis: It is highly likely that john went to the hallway, and Greg is a swan.
hypothesis_assertion: John went to the hallway, and Greg is a swan.