Patron: You said there is only one set of facts. That for each question there’s a correct answer.
Grant: That’s correct.
Patron: Then why does this book disagree with the website?
Grant: Let me check.
Grant: In this case the book is wrong.
Patron: I want figuring out what’s true to be easier!
Grant: Asking me for expert help is both simpler and cheaper than going to library school yourself.