Oral gospel traditions called the M source for Matthew and the L source for Luke, which may have been a mix of written and oral material (see Two-source hypothesis). Most scholars believe that the author of John's gospel used oral and written sources different from those available to the Synoptic authors – a "signs" source, a "revelatory discourse" source, and others – although there are indications that a later editor of this gospel may have used Mark and Luke. Oral transmission may also be seen as a different approach to understanding the Synoptic Gospels in New Testament scholarship. Current theories attempt to link
Jerusalem School of Synoptic Research seems to be concerned with not holding to an assumed-default position of Markan priority. It is especially the third assumption in more individually pronounced forms that has invited a response of the academic community. Some scholars have perceived the Jerusalem School as a group that holds to Lukan Priority. But this perception is incomplete since it is only Robert Lindsey and David Bivin who have argued strongly for Lukan priority. The third methodological assumption of the Jerusalem School is much broader and open, without any one theory being affirmed: Many scholars affirm Semitic quality of the Synoptic Gospel material as