Anne is smart. Fiona is rough. Fiona is smart. Fiona is white. Gary is young. Harry is smart. Harry is white. If Gary is red then Gary is rough. Quiet, young things are green. All smart, red things are young. If something is green then it is young. If something is smart then it is red. If something is green then it is white. All smart, young things are quiet. All young, quiet things are rough. If something is quiet and not rough then it is not young.
Harry is not smart.