How to Convince a Liberal That the New York Times is a Liberal Publication

I have had surprising difficulty in recent years getting Liberals to agree to one of the more obvious facts about journalism that has emerged during my lifetime, which is that the New York Times is a Liberal publication.

Below is a Socratic dialogue I invented which demonstrates how to logically explain this phenomenon to Liberals. Note: If your Liberal colleague does not agree to the five statements below, then they are too Liberal and unreasonable to participate in this argument and there is nothing further you will be able to do in this regard.

You: Would you agree that a good way to define a center, or moderate, outlook is that it represents the average American, somewhere about mid-way between the Liberal (left) view and the Conservative (right) view?
Liberal: Sure

You: Would you agree that if someone is generally left of the current political mainstream in their viewpoints then they can be described as "Liberal", and if someone is generally right of center in their viewpoints then they can be described as "Conservative"?
Liberal: Yes

You: Given the victory of the incompetent George W. Bush over war hero John Kerry in 2004, would you agree that the general viewpoint of the average American is currently a little right of center (Conservative)?
Liberal: Yes

You: Would you agree that the New York Times is fair and balanced, and can generally be described as being toward the center of the political mainstream?
Liberal: Yes

You: So therefore you would agree that the New York Times currently has viewpoints that are generally left of the average American.
Liberal: Right

You: Thus, compared to the viewpoint of the average American you agree that the New York Times is liberal.

(Now repeat for The Washington Post)