I understand what you're saying yet I don't believe the Average Joe is going to be analyzing it that deeply. The majority of Christians who believe that Scripture is the final authority on all matters of their faith will understand the statement for what it is — a simple, straight-forward reiteration of what Scripture says about itself. I clearly see how your breakdown of the logic would be effective in a debate. However, I'm not certain it has been beneficial for dear Willy. Perhaps save your beat downs for those who really need it? Just a thought.