You won't always be the smartest person in the room. In fact, many leadership and management experts/consultants will tell you it's not a good sign if you're the smartest in the room. You always need to be learning new things from people. 

So what happens if you're in a room full of experts on a given topic and you're having to present information to them? Information they potentially already know. 

You still want to be engaging. Still want to be persuasive and professional. And this article has a few tips and examples on how to turn skepticism into success. 

NOTE: this article is from Harvard Business Review and you should have access to a few free articles each month.