context: It is improbable that Mary grabbed the milk. It is highly unlikely that Fred went to the hallway. It is certain that Brian is a swan. It is highly unlikely that if either Mary grabbed the milk, or Fred went to the hallway, then Sumit is thirsty. There is little chance that if Brian is a swan, or Mary grabbed the milk, then Sandra left the football. It is almost certain that if Brian is a swan, or Fred went to the hallway, then Jeff discarded the apple.
hypothesis: There is almost no chance that sandra left the football, and Mary grabbed the milk.
valid_hypothesis: There is almost no chance that sandra left the football, and Mary grabbed the milk.
invalid_hypothesis: We believe that sandra left the football, and Mary grabbed the milk.
hypothesis_assertion: Sandra left the football, and Mary grabbed the milk.