Lying is a cooperative act. Think about it. A lie has no power whatsoever by its mere utterance. Its power emerges when someone else agrees to believe the lie.

Con men look for human frailty to exploit. This is most often greed. Trump found a different vice: anger. The emotional are always the most susceptible to manipulation.

Business is a battlefield. You need to be able to go to battle with your team members. Like the military. Know them, trust them, and know who you're working with.

Contempt is the only asymmetrical facial expression, so it's easy to spot once you're aware of its signs. One researcher has successfully tracked it in couples as a predictor of divorce. When someone is angry at you, you've still got traction with them, but when they display contempt, you've been dismissed.

Deception can cost billions. Think Enron, Madoff, the mortgage crisis. Or in the case of double agents and traitors, like Robert Hanssen or Aldrich Ames, lies can betray our country. They can compromise our security. They can undermine democracy. They can cause the deaths of those that defend us.

White lies keep social dignity intact and are far more prevalent than most people realize. Several studies have found that an average person is lied to from 10 to 200 times a day - mostly just to keep a conversation going, to avoid conflict, or to establish a connection with someone.

As someone who specializes in deception, I'll tell you this much: When someone insistently implores, 'Believe me,' don't. Pleading 'believe me' or 'trust me' - insisting to people that you are telling the truth - is a tell-tale sign that you probably aren't.

In the split-second before someone prepares to answer a question, he will consciously or subconsciously evaluate what the best possible answer might be. For a truthful person, the best possible answer might omit some information. It might have a few extraneous details. But it will still offer the information requested.

Any normal candidate who mocked the disabled or made crude reference to a woman's menstrual cycle or dabbled in 9/11 conspiracy theories would be out of the race. Trump's fans remain. And wait for more.

Speaking of trust, ever since I wrote this book, 'Liespotting,' no one wants to meet me in person anymore - no, no, no, no, no. They say, 'It's okay. We'll email you.' I can't even get a coffee date at Starbucks. My husband's like, 'Honey, deception? Maybe you could have focused on cooking. How about French cooking?'

It's counterintuitive to take a long time to hire someone, but it will save you enormous amounts of time and money later. Our biggest mistakes in hiring stem from speed.

Genuine expressions of emotion rarely persist longer than five seconds and almost never longer than 10. A fixed smile is likely to conceal anger, anxiety, or some other negative emotion.

Trump is a master obfuscator. Like an octopus escaping a predator, he releases a cloud of ink when called to the carpet on one of his many lies. His strategy? Obfuscate, then reference others. 'Millions agree,' 'everyone knows,' 'many have done it.'