How would I have to say all of the correspondence?
The whole reason to posit ‘Markan priority’ or ‘Matthean priority’ is as a means to explain the commonalities in the two Gospels.
That’s the real problem that’s being attempted to be solved here – in other words, if the two Gospels share material, from whom are they getting it? One from the other? Both from a different source?
So, if Mark says “A, B, C, D, E, F” and Matthew says “A, C, F, G, H”, then Markan Priority asserts “Matthew got A, C, and F from Mark”; Matthean Priority asserts “Mark got A, C, and F from Matthew.”
(On the other hand, if we posit a third source, then we might say “Mark and Matthew have A, C, and F in common. We don’t know which of these they got, one from another, and which they got from some other unknown source (oh, heck, let’s call it the ‘Π’ source (from the Greek word for source, ‘πηγή’)).”
Here’s the problem, though: if we want to posit one of these (let’s use Markan priority, since that’s what you’re asserting), but we only want to say “Matthew got A & C from Mark, but not F”… then we’ve got a real problem:
- How can we convince ourselves that A & C are from Mark, if we’re willing to say that F isn’t?
- Given that we’re willing to throw away ‘F’ as Markan material that passed down to Matthew, how can we convince ourselves that it isn’t really “A&F” or “C&F” or “A only” or “C only” or “F only” that was passed down?.. or even that there’s no common material at all?
- Worse yet, how do we explain the common material if we deny that one got it from the other?
If we begin to pick and choose… then the ‘priority’ argument falls apart. It
literally has no raison d’etre or explanatory power if you’re willing to willing to pick it apart arbitrarily.
