context: There is little chance that Greg is a lion. It is almost certain that Brian is green. It is highly likely that Mary picked up the apple. Chances are about even that if Brian is green, and Mary picked up the apple, then Lily is yellow. It is almost certain that if Mary picked up the apple, or Brian is green, then Fred went to the hallway. There is a better than even chance that if Brian is green, or Mary picked up the apple, then Sandra left the milk.
hypothesis: It is certain that mary picked up the apple, or Fred went to the hallway.
valid_hypothesis: It is certain that mary picked up the apple, or Fred went to the hallway.
invalid_hypothesis: It is highly unlikely that mary picked up the apple, or Fred went to the hallway.
hypothesis_assertion: Mary picked up the apple, or Fred went to the hallway.