I believe that, but I doubt that "thoroughly" is as thorough as you think it is. Allow me a personal example:No, all I was trying to say was that being a librarian OF COURSE I would have thoroughly researched a topic I was so interested in.
I am an amateur magician and mentalist. I have been so all my life. For the past 25 years or so, I have really been far more a researcher and collector than a performer. My library of books, DVDS, lecture notes, monographs, etc., on magic and mentalism is extensive and equal to many professional performers. My collection of professionally made magical items and mentalist items is also extensive. I am a member of multiple online forums that require extensive knowledge of magic and/or mentalism even to join. I have performed the simplest of mental acts and magic acts on the spur of the moment and had people convinced that I am either psychic or in league with the devil. I do not exaggerate; I have been accused of both of those in all sincerity.
And the catch is this: I am not really that good. The people who do this for a living blow me away in what they can do, and it is still possible to fool me. For all of the many thousands of dollars (and it is many, many thousands of dollars) that I have spent acquiring my specialist knowledge, I can still be fooled. Even lesser, unknown performers have occasionally done something that left me scratching my head with no idea how they did it. Sometimes I go out of my way to learn the method; sometimes I let it go and enjoy the wonder.
But never, never, never, do I assume that simply because I cannot figure out how something was done that it must have been REAL magic. I simply assume that I have been fooled by someone whose livelihood depends on the ability to fool people. And then I remember that it really isn't that hard to fool people, not even well-educated laymen.