"The Bible says there is a God."
"God wrote the Bible."
The interesting thing about this kind of particular argument is that it is self-supporting as opposed to making a circular chain of reason that leads nowhere.
If the reader assumes the argument to be false, then there is no way to prove (from the argument) that God wrote the Bible. One can also point out that the Bible does not say that God wrote it. The only thing the Bible does claim that God wrote with His own hand was The Ten Commandments.
If the reader assumed the argument to be true, then they accept that there is a God and that He authored the Bible. However, when confronted with the evidence that the Bible does not say God wrote it, they will point out that the Bible was inspired by God, meaning it reveals the will of God. And further more, the Bible describes the nature of God.
Naturally this is frustrating to the non-believer.
The believer does not look at the argument as a whole, but rather as two independent statements that are poor generalizations of:
What one should now be asking is: