It's because you can't just sit down and di if you don't know how to spell, I can't spell anyway, d'you know when I did it, the student actually wrote a letter to me and to th or to the exam board car saying that this hand-writing is appalling and the spelling, it's due to the person who was doing the amanuensing, rather th but I was marking it anyway so it didn't really matter, but they were so distressed at the handwriting that I produced.