context: We believe that John left the apple. It is improbable that Brian is yellow. There is almost no chance that Greg is gray. It is highly likely that if Greg is gray, and Brian is yellow, then Mary went to the kitchen. It is probable that if Brian is yellow, or Greg is gray, then Sandra got the apple. It is almost certain that if Brian is yellow, and John left the apple, then Julius is a swan.
hypothesis: There is a better than even chance that brian is yellow, or Mary went to the kitchen.
valid_hypothesis: There is little chance that brian is yellow, or Mary went to the kitchen.
invalid_hypothesis: There is a better than even chance that brian is yellow, or Mary went to the kitchen.
hypothesis_assertion: Brian is yellow, or Mary went to the kitchen.