Just as a forward here I am an atheist just trying to gain a broader perspective.
I'm curious how one can be sure that god is incapable of lying. I feel as if Christians would immediately look to the Bible for verses explaining god's inability to lie. This seems like somewhat of a conflict of interest however. The Bible is the direct word if god. You can't find out if something can lie by looking to its own words. Is there some sort of third party or independent source that Christians can look to to know that god can not lie?