On the joys of borrowed intelligence
There's a marvelous (probably apocryphal) story about a database vendor who was giving a sales pitch to a prospective customer's applications people, all of whom were assiduously taking notes on their PCs. The audience asked questions that got steadily more technical and abstruse until the sales reps found themselves (to their surprise and dismay) ineptly discussing the relative merits of static versus temporary tables.