context: It is certain that Jessica is a mouse. It is highly unlikely that Mary went to the office. Chances are about even that Brian is yellow. It is impossible that if either Jessica is a mouse, or Brian is yellow, then John dropped the apple. There is almost no chance that if Jessica is a mouse, and Brian is yellow, then Bill got the milk there. We believe that if Brian is yellow, and Mary went to the office, then Bernhard is a lion.
hypothesis: It is impossible that mary went to the office, and John dropped the apple.
valid_hypothesis: It is impossible that mary went to the office, and John dropped the apple.
invalid_hypothesis: It is highly likely that mary went to the office, and John dropped the apple.
hypothesis_assertion: Mary went to the office, and John dropped the apple.