I will admit my . frustration with McNabb sometimes gets the better of me but I just can ' t see the promise in him that I see in our other younger players . Our D is in a very bad way but I think he ' s more of a liability than a relief . <| sep |> I have tried to be very clear that this is merely my understanding . I really hope the guy in your radio interview is correct , I ' ll be happy to be wrong about this . But my objections to your link are that it is not enough , on its own , to prove me wrong . I ' m asking that people assess this source critically . But instead you want to argue that this man has the authority to speak definitively on this issue . I hope you ' ve taken enough logic courses to understand why argument from authority isn ' t a valid argument .