On BBC 5Live right now Simon Mayo and Mark Kermode are discussing Richie Cunningham's new film. Both men - bright, in their forties - have been shocked to discover they've been misspelling dilemma their whole lives. Hitherto, they've had it as dilemna. Perhaps five years ago I discovered the same thing. I used to spell it - and frankly still want to spell it - with an n. The extraordinary thing I discovered then, and these guys are discovering now, is that dilemma has never been spelt any other way: dilemna is not an archaism, and you will not find it in any ancient work. And yet, and yet there are many people who think it is spelt with an n and say they were in fact taught to spell it with an n. A small, odd thing.