Dave is blue. Dave is cold. Dave is rough. Dave is not white. Erin is blue. Erin is cold. Erin is green. Erin is rough. Erin is white. Erin is young. Harry is cold. Harry is not furry. Harry is green. Harry is rough. Harry is white. Harry is young. If something is not blue then it is young. If Harry is rough then Harry is not furry. If something is blue and not young then it is not furry.
Harry is blue.