"The silence of the early material about so much of what Jesus (according to the later material) said and did, is widely admitted to be something of a problem. Of course, silence does not always imply ignorance. But a book on transport in Cologne which, though written after 1965, made no reference to an underground railway, might reasonably be presumed to have been written in ignorance of the underground then constructed there. In other words, silence on a topic is significant if this silence if this silence extends to matters obviously relevant to what the writer has chosen to discuss." G.A. Wells, The Historical Evidence for Jesus (Buffalo, NY: Prometheus, 1986), p. 218.