Meu comentário original foi bastante irreverente, mas me deparei com essa entrevista que aborda indiretamente esse ponto. Ele não responde à sua pergunta, mas sugere que ela é impossível de responder .
Have you ever made a map or blueprint of the school?
No, because all those staircases keep shifting around and rooms pop out of nowhere, and stuff just moves too much. But I have got a notebook that reminds me what floor everything is on, just to keep track. Of course, if anything moves, I can blame it on magic, not my mistakes.
— America Online chat transcript, AOL.com (October 2000)