I don't think that's how most people, at least non-scientists, operate. They are more likely to believe the content before actually receiving it based on their preconceived bias of the speaker. That's why we don't question newly elected officials who are suddenly make definitive statements about subject areas where they objectively have little to no knowledge. We assume because they are elected officials, they are smart in anything they want to be in. Whereas I would postulate being an elected official means you are knowledgeable in one area only - winning an election.