Re: 7X13 The Name Of The Doctor(Grading/Discussion)(SPOILERS!)
Matt Smith clearly said "The name I chose is The Doctor. The name you choose is like a promise you make. He's the one who broke the promise."
The implication is that Hurt's character started out as The Doctor but did something so bad that the other incarnations of The Doctor refuse to give the title of Doctor to John Hurt incarnation.
"Everything should be made as simple as possible, but no simpler." -- Albert Einstein