Send us Fan Mail Most candidates prep for the McKinsey PEI like a regular behavioral interview. McKinsey built it to do more than that. One story, and up to 25 follow-up questions testing whether what you said the first time still holds. That's why memorized answers fall apart under the PEI. Scripted stories crack under repeated follow-ups. The ones that hold up are built to survive being asked the same thing five different ways. In this episode, Namaan breaks down the four traits McKin...