How can you prove that the gospel of Mark is not the "word of god"?

[Jesster]

Same answer. The claimee is held to provide the evidence. Once evidence is provided we can argue. What evidence do you provide?

Well, the evidence would be that it is the only gospel without any errors. It is also seen by scholars as the most authentic gospel. So the claimee (if he/she is a christian) could say that this is the only gospel that was divinely inspired.

That's not strong enough evidence. A book can have no errors (that we know of) and still be fictional.

Again, I'm not trying to disprove it. I'm just not accepting that the gospel of Mark is entirely factual yet.