I ran across this quote for a project I was working on and I'm posting it here because I've always thought that just because someone is viewed as an 'expert' or just because someone has a lot of letters after their name this does not mean they have a corner on the truth. Oooh, I've met too many in lots of fields that believe this. So here's the quote:

Our research has yielded (and we have systematically catalogued and footnoted for the first time) thousands of examples of expert misinformation, disinformation, misunderstanding, miscalculation, egregious prognostication, booboos, and occasional just plain lies. And based on our preliminary findings we can say with some confidence that the experts are wrong without regard to race, creed, color, sex discipline, speciality, country, culture, or century. They are wrong about facts, and they are wrong about theories, they are wrong about dates, they are wrong about geography, they are wrong about the future, they are wrong about the past, and at best they are misleading about the present, not to mention next week.

Christopher Cerf and Victor Navasky, "Introduction to the Original (1984) Version," The Experts Speak: The Definitive Compendium of Authoritative Misinformation, rev. ed. (New York: Villard, [1984] 1998, xxvii.

I can almost see you nodding your head and hear you saying "You got that right!"