Anne is quiet. Anne is rough. Bob is green. Bob is quiet. Bob is round. Bob is young. Charlie is not red. Charlie is young. Gary is blue. Gary is green. Gary is quiet. Gary is red. Gary is rough. Gary is round. Gary is young. If Bob is blue then Bob is not red. Rough things are red. If something is rough and not blue then it is quiet. If something is green then it is round. All green, red things are round. If something is rough and not red then it is not green.
Bob is young.