New Testament scholar Donald Guthrie highlights a flaw in the literary critical approach to the Gospels: the genre of the Gospels has not been fully determined. No conclusive evidence has yet been produced to settle the question of genre, and without genre, no adequate parallels can be found, and without parallels "it must be considered to what extent the principles of literary criticism are applicable". The validity of using the same critical methods for novels and for the Gospels, without the assurance the Gospels are actually novels, must be questioned.