Sometimes it is very difficult to suppress inner emotions.
A full day is devoted to practical truth and lie detection for conservation officer recruits. A practical application of determining truthfulness is the best way to practice.
As the class discusses the lie detection simulation, Recruit Morgan Phelps shows an outward sign of extreme confidence in his decision.
The evaluation gesture is seen throughout the class as the recruits actively try to determine if the speaker is truthful. During a real interview, it may not be a good thing to show the person you are skeptical.