Nothing is certain in life but death and taxes. And in Donald Trump's case, lies.

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.

Breaks in trust are infuriating and hurtful, but they don't entitle you to flame out, throw a fit, or stomp around rolling your eyes. Try to keep the steam from coming out of your ears.

One-year-olds learn concealment. Five-year-olds lie outright: they manipulate via flattery. Nine-year-olds - masters of the cover-up. By the time you enter college, you're going to lie to your mom in one out of every five interactions.

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.

Contempt is the only asymmetrical expression in the muscular facial system: Disgust, fear, happiness, surprise and anger typically express themselves symmetrically. Contempt is marked by one lip corner pulled up and in a dismissive sneer.

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.