Pop-up ads keep telling Mike to test his food sensitivity. Is that bulls--t? Today on The Gist, we ask Maria Konnikova of The New Yorker about the differences between food allergies and intolerance. Plus, Meghan Daum discusses the craft of essay writing, and the near-death experience that taught her nothing. She's the author of The Unspeakable. For the Spiel, the importance of the galvanizing anecdote in the University of Virginia rape case.

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