Dave is blue. Dave is kind. Dave is round. Dave is smart. Dave is white. Fiona is cold. Fiona is round. Fiona is smart. Fiona is young. Harry is blue. Harry is smart. Harry is young. If Harry is young and Harry is cold then Harry is round. If something is smart and round then it is white. Young things are round. White, blue things are young. If something is kind and blue then it is round. All smart, kind things are white.
Harry is not cold.