New Testament scholar, James D.G. Dunn believes that "the earliest tradents within the Christian churches [were] preservers more than innovators...seeking to transmit, retell, explain, interpret, elaborate, but not create de novo...Through the main body of the Synoptic tradition, I believe, we have in most cases direct access to the teaching and ministry of Jesus as it was remembered from the beginning of the transmission process (which often predates Easter) and so fairly direct access to the ministry and teaching of Jesus through the eyes and ears of those who went about with him." Nevertheless, David Jenkins, a former Anglican Bishop of Durham and university professor, has stated that "Certainly not! There is absolutely no certainty in the New Testament about anything of importance."Critical scholars have developed a number of criteria to evaluate the probability, or historical authenticity, of an attested event or saying represented in the gospels.  These criteria are applied to the gospels in order to help scholars in reconstructions of the Historical Jesus. The criterion of dissimilarity argues that if a saying or action is dissimilar to, or contrary to, the views of Judaism in the context of Jesus or the views of the early church, then it can more confidently be regarded as an authentic saying or action of Jesus. One commonly cited example of this is Jesus' controversial reinterpretation of the Mosaic law in his Sermon on the Mount, or Peter's decision to allow uncircumcised gentiles into what was, at the time, a sect of Judaism. The criterion of embarrassment holds that the authors of the gospels had no reason to invent embarrassing incidents such as the denial of Jesus by Peter, or the fleeing of Jesus' followers after his arrest, and therefore such details would likely not have been included unless they were true. Bart Ehrman, using the criterion of dissimilarity to judge the historical reliability of the claim Jesus was baptized by John the Baptist, notes that "it is hard to imagine a Christian inventing the story of Jesus' baptism since this could be taken to mean that he was John's subordinate."The criterion of multiple attestation says that when two or more independent sources present similar or consistent accounts, it is more likely that the accounts are accurate reports of events or that they are reporting a tradition which pre-dates the sources themselves. This is often used to note that the four gospels attest to most of the same events, but that Paul's epistles often attest to these events as well, as do the writings of the early church, and to a limited degree non-Christian ancient writings. The criterion of cultural and historical congruency says that a source is less credible if the account contradicts known historical facts, or if it conflicts with cultural practices common in the period in question. It is, therefore, more credible if it agrees with those known facts. For example, this is often used when assessing the reliability of claims in Luke-Acts, such as the official title of Pontius Pilate. Through linguistic criteria a number of conclusions can be drawn. The criterion of "Aramaisms" as it is often referred holds that if a saying of Jesus has Aramaic roots, reflecting Jesus' Palestinian context, the saying is more likely to be authentic.

Question: How many gospels seem to concur on a number of events?
Answer: four