Victoria asked in the comments to my previous post what Gathercole’s reasons were for his dating and I thought it would be easier to do this as a new post than to put it in the comments section. He divides the chapter on dating into three sections:
- evidence for a terimnus ante quem – in which he includes the papyrological data which suggest that the P Oxy papyri tend to be assigned dates in the third century, especially the early or middle part; and the testimonia from other writers gives similar dates. He thus suggests that roughly 200 CE is a reasonable date for the original mss. He then discounts arguments for an early date that propose that GThom influenced the canonical gospels; that the depiction of James in S12 suggests that James was still alive; that the fact that GThom appears to have been influenced by the Synoptics but not John suggests that it was written after the Synoptics but before John; and Uro’s suggestion that it must be seen as early because it doesn’t evidence a fully developed Gnostic character.
- evidence for a terminus a quo – in which he discounts the suggestion that the author knew the Diatessaron (which would give an earliest date of after 175 CE); questions the idea that Ss 68 & 71 denote evidence that it was written before the destruction of the Temple (DeConick), or soon after (Dunderberg) and instead supports the idea that they refer to the Bar Kochba revolt – which suggests post 135 CE. He sees the idea expressed by some that Thomas thought Matthew to have been authoritative also supports a post 100 CE dating.
- additional indications – here he agrees with Hedrick that Thomas’ use of the term “the Jews” in S 43 suggests at least the end of the first century as a dating; that his stance on circumcision in S53 fits better in early to middle second century; and that while he hesitates to label the gospel ‘Gnostic’ some of the motifs are clearly influenced by Gnosticism, which would again make it later rather than earlier.
Mark Goodacre in his Thomas and the Gospels: the case for Thomas’s familiarity with the Synoptics (Grand Rapids, Mich.: W.B. Eerdmans Pub. Co., 20102, pp 169-71) also argues that a dating post Bar Kochba revolt is fairly convincing – they both cite Hans-Martin Schenke in On the Compositional History of the Gospel of Thomas (Institute for Antiquity and Christianity, 1998, p 28).
Quite clearly, given the range of datings suggested by reputable biblical scholars (Gathercole lists 31 in his table, ranging from DeConick’s kernel prior to 50 CE through to Drijvers about 200 CE), the evidence is not at all clear, despite the fact that most are reasonably clear in their opinions. Where one lands depends to a certain extent on how much weight one puts onto particular pieces of evidence and there is a certain amount of personal opinion behind the scholarship, I think. This is not an issue on which my work actually turns, so I am prepared (to use one of Gathercole’s favourite expressions) to ‘remain agnostic’ about it for the moment.