Christ myth theory proponents[18] claim that the age, authorship, and authenticity of the Gospels can not be verified, thus the Gospels can not bear witness to the historicity of Jesus.[19][20] This is in contrast with writers such as David Strauss, who regarded only the supernatural elements of the gospels as myth, but whereas these supernatural myths were a point of contention, there was no refutation of the gospels authenticity as witness to the historicity of Jesus.[21]