I've written before (here and here, for example) about how difficult it is, in a universe of cultural relativism, to pitch a piece of writing. What assumptions can you make about the knowledge base of your readership, or the allusions they might pick up? Each sentence is a precarious balancing act between going over their heads and insulting their intelligence.
Increasingly, it seems that content producers are more worried about the former sin than the latter. But is this wise? Last night I sat down to watch a documentary about some travellers who got into trouble in the Amazon rain forest. I lasted about three minutes, switching off when the narrator boomed "Bolivia, South America". It's straightforward enough; if something's pitched at people who don't know what continent Bolivia's in, I'm probably not going to enjoy it.
And from La Paz to Pacem in Terris (did you see what I did there?), here's the closest you'll get to a Christmas card from me this year. Although, I'll be honest, it's not as good as Llewtrah's festive quiz. But what is?