If you are a complete fraud you overcompensate and you lack passion, you lack of decisiveness to elaborate the creative details. It's really hard to master the skills so you don't be like that when lie. I think the psychological trick is to convince yourself that you are authentic and having some truth goes a long way with helping convincing yourself. This is why, when you know just a little bit about a subject you can go in great detail of explaining how things work as you are the greatest expert.

Or, you know, being a total psychopath will do the trick!

But lying is a much more transferable skill.

> being a total psychopath will do the trick

I know you intended that to be ironic humor, but the road to success in business often runs close to the border of psychopathy.

Actually, in my opinion, the real advantage probably comes from being able to stay out of the emotional context of the situation. Most people are consumed by things like how they feel or how others feel and get blinded to the implications of following those emotions.