The "deus ex machina" device is often criticized as inartistic, too convenient, and overly simplistic. Aristotle identifies two specific types of persuasion methods&colon; artistic and inartistic. It contains lectionary markings and inartistic pictures. It is decorated, but decorations were made by inartistic hand. Outside the design is monstrous and inartistic. Dealing the fatal blow with a rook or knight is considered inartistic. The inscription on the reverse included a tribute to Harding; Fraser deemed it inartistic.