Let's say a journalist hears an exciting new idea propounded by a gifted phrase-maker who happens not to have a professional credential in the field. Let's say that journalist writes a one-sided cover story for his newsmagazine propounding his source's theory. And let's say that a year later he writes a story about public policies on the very issue where he's so heavily invested on one side of the debate.
Unfortunately for American journalism -- and for the public debate...
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