Charlie is kind. Charlie is rough. Charlie is smart. Charlie is white. Charlie is young. Dave is kind. Dave is smart. Dave is white. Gary is quiet. Gary is young. If Charlie is not smart then Charlie is rough. Green things are not rough. If something is young then it is quiet. If something is smart and not young then it is white. If something is kind and not rough then it is green. If something is smart and not white then it is not kind.
Gary is young.