context: It is certain that Fred dropped the apple. It is unlikely that Mary moved to the office. It is highly likely that Greg is gray. There is little chance that if either Mary moved to the office, or Fred dropped the apple, then Brian is yellow. It is unlikely that if either Greg is gray, or Mary moved to the office, then Julius is gray. It is almost certain that if Greg is gray, or Fred dropped the apple, then John left the football.
hypothesis: It is highly unlikely that greg is gray, and Brian is yellow.
valid_hypothesis: It is highly unlikely that greg is gray, and Brian is yellow.
invalid_hypothesis: There is a very good chance that greg is gray, and Brian is yellow.
hypothesis_assertion: Greg is gray, and Brian is yellow.