It's easy to be believed when you're an "authority"

A Washington Times article points out that U.S. congressional committees are swayed by the opinions of experts, even when the experts' research is based on poor science or junk science. The power of authority is so strong that - even when it's built on dubious foundations - ordinary people believe your authority, not the facts.

This is not to say that you should deliberately mislead people, just because you're in a position of authority. Far from it. But do be aware that people view your authority as a shortcut to your credibility. So don't feel that you have to justify every little thing and every tiny detail. Your position gives you subconscious authority in your audience's mind. Don't abuse it, but don't overlook it either.