"I affirm that Marcion's Gospel is adulterated; Marcion, that mine is. Now what is to settle the point for us, except it be that principle of time, which rules that the authority lies with that which shall be found to be more ancient; and assumes as an elemental truth, that corruption (of doctrine) belongs to the side which shall be convicted of comparative lateness in its origin" (AM 4:4)No, in the case of Tertullian, it is better than an argument from silence. He explicitly says that the accusations of forgery flew in both directions, Marcion claiming that the Catholics had done it and the Catholics claiming that Marcion had done it, and he explicitly says that there is only one way to decide who is right: to look at which one corrupted the doctrine of the other, since one cannot corrupt what one does not already have in hand. This is an exegetical argument, and it is, according to Tertullian himself, the only argument that can be made. Granted, he fills it out a bit more, supplementing it, as it were, but the supplements are exegetical in nature, and depend on his reading (for example) the Antitheses; in each case, Tertullian's argument is not without rival. The only tradition he points to is that Marcion once made a donation to the Roman church; Tertullian takes this to mean that he once agreed with the Catholic church and then fell away from the truth into heresy. But any fool can list alternative and equally plausible explanations for this account that do not involve Marcion having deliberately corrupted canonical Luke.
Does "Marcion" here stand for Marcion (dead by then), or contemporary Marcionites of Tertullian's times?
Of course Marcion or Marcionites would say that.
Anyway I do not see here counterclaims between Catholics and Marcion(ites), just between Tertullian and Marcion(ites).
Anyway, it occurs to me (better late that never) Marcion claimed that gLuke was written after his gospel (itself written earlier), but with gLuke redacted before Marcion's times (I do not see any evidence to the contrary in Tertullian's works). But Marcion issued his gospel around 130, a gospel which was not known before. That's very suspect. Anyway, that would not affect gLuke as written in the first century, with gMarcion (or proto-Luke) pretended to be written earlier. I think you suggested something like that.
Anyway, if gLuke was written in the first century (and before 65-70 as believed by Christians then & now), and gMarcion claimed by Marcionites to be written earlier than gLuke, it would be rather impossible for Tertullian some 150 years later) to prove that gLuke was written before gMarcion (or proto-Luke), except through comparing gMarcion with gLuke.
Yes, but the gospel that Marcion accused Catholics to have corrupted is gMarcion. Why? Certainly Marcion could not have implied he himself corrupted a proto-Luke gospel for his own use, that his gospel was not that proto-Luke but a proto-Luke he edited himself. Marcion would have claimed that his gospel was the proto-Luke gospel, the earliest and authentic. I do not see any other way which makes sense.According to Tertullian, Marcion claimed that there was a gospel that the Catholics corrupted into canonical Luke. That would be a proto-Luke. On the Marcionite side of the evidence, it remains, at least theoretically, an open question whether (A) Marcion was claiming that his gospel owed its very existence to Marcion himself or (B) Marcion was claiming that the gospel was an already extant text. I do not think Tertullian gives us enough to decide on that score.
Cordially, Bernard