It's only a general rule at Fox News

I don't know what it is about this that made me laugh.

And in an interview, John Moody, a senior vice president at Fox News, said its commentators had erred by citing the Clinton-Obama report. “The hosts violated one of our general rules, which is know what you are talking about,” Mr. Moody said. “They reported information from a publication whose accuracy we didn’t know.”

Is it that knowing what you're talking about at Fox News is a "general rule" subject to exceptions, or that they need to discuss such a rule at all?