Who Can Really Say?

From Volokh:

Moore and the New York Times: Dan Gifford passes this along; it was apparently transcribed by a listener, purportedly from the June 18, 2004 Late Show with David Letterman. Don't know if it's true, and I won't assume that it is. But it's at least a good joke:

David Letterman: How do we know what's in your film [Fahrenheit 9/11] is true?

Michael Moore: Because I got most of my information from The New York Times.

Audience: Wild laughter.

Letterman: Strains to repress laughing

Moore: What's so funny?

(I should mention that Moore was indeed on the June 18 show, but the excerpt available on the highlights site is only of Moore's memories of his Oscar night).

Is it true? Who can really say?

UPDATE: Alas, not true. Chalk it up to one of those stories that would have been funny if . . . .