All of this is true. However, if we know with reasonable certainty that 1 Cor. 15:3-8 is an early creed, we don't really need for a second author to quote it before we can draw reasonable conclusions from the creed itself.
Of course not. All I'm saying is that one source does not equal two sources, even if that source mentions something else. This doesn't say anything about the quality or nature of that single source. It could be great; it could be rubbish... you need to look at the source itself to decide. But I don't think the fact that Paul cites something that we don't have any other source for necessarily lends any extra credibility to the passage.
I don't see any good reason to doubt Paul's testimony. He knew the disciples personally (Galatians 1:18-2:14), so he is a good (and early) source for what they were claiming. His authority as an apostle and his relationship to the disciples is attested by the church fathers (I'll find citations if you want), and never unfavorably.
If you say so. But in citing Paul alone, you still rely on him and his character. Hypothetically, if evidence were found tomorrow that impeached his credibility, information that comes to us from Paul alone would be held in doubt in a way that information that comes from him but is also supported by other sources would not be.
I think this is where our biggest confusion lies. I am certainly not arguing that we have direct access to Q. The Q source is totally hypothetical and depends completely on the theory (which most scholars accept, Christian or not) that Mark was written first. If Mark was written first, then there was another independent source which Matthew and Luke both drew from. Although we may not have direct access to this source, it is nevertheless an 'independent source' that we know about, and about which we can (carefully) form reasonable conclusions.
I think this may be an issue of semantics. I agree that Q
would be an independent source if you had it, but you don't. You can piece together bits of what Q probably said by looking at the Synoptic Gospels, but in doing so, your picture of Q is literally dependent on those other texts. Whatever you know of Q, it's definitely not an independent source... to you.
In my mind, the term "source" (in the way we're using it) only really has meaning in support or defense of some claim or argument. If you can't draw from a particular thing, then it's not a source
for you, and therefore not a source at all in any real sense, regardless of how it would help your case if you did have it, and regardless of how much other people in the sources you do have talk about it.
You've got Mark, Matthew and Luke, as well as an idea of Q that depends on them. In this situation, Q is not an independent source:
- whatever version you have of Q is
not independent - it depends on the Gospels.
- while there may be an independent version of Q floating around out there, it's
not a source for you, because you can't draw from it directly.
This is what I have been getting at with the creed: The fact that we only know about it through Paul does not mean Paul invented it. We have very good reason for believing that it is early oral tradition, and I cannot emphasize enough that even skeptical scholars admit this. The fact that we only know about it through Paul does not mean that it can't be treated as an independent source, since all evidence indicates that it is independent, and very early. If you say that this is an unreliable way to form historical conclusions then I would challenge you to find a historian who disagrees.
Maybe an analogy will help get my point across:
Claiming that Q (or that creed in 1 Cor 15) is a source in its own right is kinda like padding the reference list of your report by citing the one book you actually read, plus all the books in
that book's reference list even though you didn't read them for yourself. In academic circles, this sort of thing is frowned upon.
This doesn't mean that Q or that creed don't exist in their own right or even that the sources you have strongly point toward their existence and characteristics any more than it means you can't go to the library and read the books in your one real source's reference list if you wanted to... but it does mean that you
don't have them independently.