context: It is probably the case that Brian is white. There is little chance that Mary moved to the office. It is impossible that Julius is a rhino. It is highly unlikely that if Mary moved to the office, or Brian is white, then John got the apple. It is unlikely that if either Julius is a rhino, or Mary moved to the office, then Greg is yellow. There is a better than even chance that if Julius is a rhino, or Mary moved to the office, then Bill went to the kitchen.
hypothesis: It is highly unlikely that mary moved to the office, and Brian is white.
valid_hypothesis: It is highly unlikely that mary moved to the office, and Brian is white.
invalid_hypothesis: It is almost certain that mary moved to the office, and Brian is white.
hypothesis_assertion: Mary moved to the office, and Brian is white.