Why was self-confidence more important than accuracy when others judged them?
For some reason, we are mesmerized when people express themselves with absolute conviction. We will overlook inaccuracies, omissions, and flaws in reasoning, because conviction temporarily distracts us from the substance of what they’re saying.
Donald Trump's secret sauce is absolute certainty! Nothing he says is wishy washy. He has the biggest brain. He is smarter than the generals and the scientists. Only he can solve the countries problems and guess what? Millions of American believed him.
Fake till you make it also has a positive side that you can use. Nervous about an important presentation or interview? Fake it. Tell yourself you are the best person for the job or presentation and then act like it. Stand tall, speak strong and look the part because it will make you look more competent and believable. Trust me I've done this many times in my life particularly when speaking in front of large groups and it works!
Beyond the obvious..
Did you know that the first person to speak up at a meeting is usually the one whose thoughts and ideas are accepted? Why? Because speaking up first makes you appear to be the dominant person in the room and thus deemed to be confident and believable. So when your boss asks for input or ideas, be the first to stand up and respond and every one present will think more highly of you.
Remember this....Donald Trump got to be President of the United States because he faked it until he made it!