It was funny how much Ariadne enjoyed Divination lessons, given that she was always confused, way more clueless than the other students. Still, she attempted to answer the question, obviously not expecting to be right.

'Is bibliomancy somehow related to oneiromancy, the interpretation of dreams?' the Gryffindor first year suggested. 'Dreams are a product of our subconscious, which also determines the sentences or words we choose in a book. And also, in the Bible, dreams are often mentioned as omens or means by which God communicates with the mortals, and the Bible is also the most used book in bibliomancy.' A bit of explaination made the answer seem less dumb, at least. There were also lots of books on dream interpretation...