context: It is highly unlikely that Brian is white. There is almost no chance that Greg is green. Chances are about even that Mary went to the hallway. We doubt that if Mary went to the hallway, and Greg is green, then Yann is tired. It is highly unlikely that if either Mary went to the hallway, or Brian is white, then Lily is yellow. It is almost certain that if Greg is green, and Mary went to the hallway, then John put down the apple.
hypothesis: Chances are about even that mary went to the hallway, or Greg is green.
valid_hypothesis: Chances are about even that mary went to the hallway, or Greg is green.
invalid_hypothesis: It is almost certain that mary went to the hallway, or Greg is green.
hypothesis_assertion: Mary went to the hallway, or Greg is green.