Terry Pratchett said this quote

“ Rincewind picked up a spare paper and read it.It was headed: Examination for the post of Assistant Night-Soil Operative for the District of W'ung.He read question one. It required candidates to write a sixteen-line poem on evening mist over the reed beds.Question two seemed to be about the use of metaphor in some book Rincewind had never heard of.Then there was a question about music . . .Rincewind turned the paper over a couple of times. There didn't seem to be any mention, anywhere, of words like 'compost' or 'bucket' or 'wheelbarrow'. But presumably all this produced a better class of person than the Ankh-Morpork system, which asked just one question: 'Got your own shovel, have you? ”