context: It is improbable that Greg is yellow. It is likely that Mary is in the hallway. It is certain that Bill put down the milk.
hypothesis: There is little chance that bill put down the milk, and Greg is yellow.
valid_hypothesis: There is little chance that bill put down the milk, and Greg is yellow.
invalid_hypothesis: It is likely that bill put down the milk, and Greg is yellow.
hypothesis_assertion: Bill put down the milk, and Greg is yellow.