context: It is almost certain that John dropped the apple. It is almost certain that Greg is a frog. It is highly likely that Brian is yellow. Chances are about even that if either Greg is a frog, or Brian is yellow, then Sandra got the apple. There is almost no chance that if either Greg is a frog, or John dropped the apple, then Mary went to the hallway. It is highly likely that if Brian is yellow, or John dropped the apple, then Julius is white.
hypothesis: There is little chance that mary went to the hallway, or Brian is yellow.
valid_hypothesis: It is highly likely that mary went to the hallway, or Brian is yellow.
invalid_hypothesis: There is little chance that mary went to the hallway, or Brian is yellow.
hypothesis_assertion: Mary went to the hallway, or Brian is yellow.