I'm wondering at what point one passes or fails the 'may have some knowledge' test: there are four shows on that list for which I have never seen any canon nor read any fic, and three more where I've read no fic and seen exactly one episode, and yet in every case I recognise the name and could find someone already on my lj flist who was a real fan of the show.

Maybe that only proves something about the circles in which I have friends.