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There's a reason the old phrase goes "eating your own dog food" — extend the metaphor, and you see why it's unhealthy for a pundit to believe what he feeds to viewers. A reader reports:

"What's his face from [Former 'Screen Savers' TV co-host Patrick Norton] was just walking around the office with some other dude, debating about whether the other dude was merely a product market or a 'product evangelist.'"