Dave is big. Dave is blue. Dave is furry. Dave is quiet. Dave is rough. Dave is not young. Erin is furry. Erin is smart. Harry is big. Harry is blue. Harry is rough. Harry is young. All rough things are quiet. All smart things are quiet. If something is blue and not young then it is smart. All quiet, young things are rough. If something is furry and big then it is smart. Big, quiet things are smart. If something is quiet and not rough then it is big. If something is blue and not rough then it is smart.
Harry is smart.