I'm absolutely certain that someday -- probably soon -- I will have the following exchange with a patient:
Me: What can I do for you today, Mr. 400lb Man?
400lb patient: Well, Doc, I heard on TV that if you write down everything you eat, you'll lose weight. So I've been writing down every last thing I've eaten for the last month, and I haven't lost any weight at all!
Me: (perusing diet diary) Um, when you add all this up, you're eating like 6000 calories a day.
400lb P: So?
Me: The idea is that by being more aware of what you eat by writing it down, you can reduce your food intake. That's how you lose weight.
400lb P: Charlie Gibson didn't say anything about eating less. He just said if you write it down, you'll lose weight.
Me: The only way that can happen is if you eat less.
400lb P: But I wrote it all down. That's all they said you had to do. Damn media! Getting my hopes like that for nothing!