You Have to Project Confidence

In "The Person In Your Ear" from "Rabbit Hole," John Weir gives Hailey Winton lessons in deception so that she can help him with an op. He asks her to tell him a story about herself. When she hesitates in telling her story, he tells her that he knows she's lying or not telling the whole truth, that people can smell dishonesty, but everyone's a sucker for confidence.

Example of:
Hesitation Equals Dishonesty