Dave is blue. Dave is rough. Dave is round. Dave is white. Harry is blue. Harry is red. Harry is rough. If something is blue and red then it is not quiet. If something is rough and not quiet then it is big. If something is big then it is rough. If Harry is round then Harry is not rough. All red, white things are not quiet. If something is round and big then it is red. If something is not white and not rough then it is not round. If Dave is not rough then Dave is not big.
Harry is red.