Something is either true or it's false. If it's true, end of story. If it's a lie, call it out.
The media shouldn't offer the right of rebuttal to truths or facts.
The other half is turning to the camera and telling viewers which of your two guests just lied.
Remember: there aren't two sides to facts, or to the truth. There's only one.
It should be the duty of the media to seek out the truth, to sift the facts from the lies, and to anchor all coverage around them.