I've said multiple times how impressed I am with Xo, trying to not only defend the indefensible, but having no one to help. I don't think we're trying to have him be some 3rd party fact checker. I think what gets him, or anyone in trouble for that matter, is to be so demonstrative in some accusation, yet spend no time what-so-ever to back it up. It's merely a request to fact check his own stuff....at least some of the time. Whether its some meritless accusation of me or another conservative as being racist, or when presented facts that refute one of his wreckless claims, for him to use facts and/or evidence to substantiate his side. That would be a good start.
So what "we" can do, is to encourage that. Obviously you and Bt can do it better than I, as I've lost all patience in trying to illicit some factual back-up on his part, so I'm just highlighting his lack of effort now, for the most part