Too many interviews are too polite and too gentle. Consequently, you only learn about a candidate’s persona under the best conditions. One thing I learned in the military, reinforced throughout my life, is that you don’t really know your partners and colleagues and teammates until you see them under stress. The strong and weak points of most people’s personalities, skills, and judgments become obvious when they are subjected to stressful situations such as boot camp, survival training, challenging physical exertion, or high-stakes competition. So why not apply this to interviews? Stress is extremely effective at exposing strengths and weaknesses, enabling you to discern the real candidate from their interview façade.