A century ago using dubious documents and unsubstantiated rumors was common in the press. Back then it was standard to caveat such curious items as 'important if true'.
In today's modern society we have technology that can tell the probability of forgery or not but Mapes is claiming that todays journalist have no obligation to use the technology, especially when they have an agenda. The modern media didn't get their way in the last election so now they will browbeat us with everything from oil to Libby and I'm really getting sick of it. They're still trying to play the game after places like FR has already claimed checkmate.