Development of the New Testament canon writers. (Books not attributed to these three are: Matthew, Mark, Luke, Acts, James, and Jude. The authorship of Hebrews has long been disputed.) Many modern Protestants point to four "Criteria for Canonicity" to justify the books that have been included in the Old and New Testament, which are judged to have satisfied the following: The basic factor for recognizing a book's canonicity for the New Testament was divine inspiration, and the chief test for this was apostolicity. The term "apostolic" as used for the test of canonicity does not necessarily mean apostolic authorship or derivation, but rather "apostolic authority". "Apostolic
Development of the New Testament canon present in none of these texts. The narrative mainly follows the chronology of John. This is called the Diatessaron ("(Harmony) Through Four") and it became the official Gospel text of the Syraic church, centered in Edessa. Irenaeus of Lyons referred directly to a defined set of four gospels (the "Tetramorph"), "c". 180. In his central work, "Adversus Haereses" Irenaeus denounced various early Christian groups that used only one gospel, such as Marcionism which used only Marcion's version of Luke, or the Ebionites which seem to have used an Aramaic version of Matthew, as well as groups that used more than