|"Are you a wizard or not?"
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- "[...] and doors that weren't really doors at all, but solid walls just pretending."
- —The walls
These walls are walls which pretend to be doors. They are all over Hogwarts Castle and annoy first years.
These were possibly developed in the castle by Rowena Ravenclaw, as she did most spellwork on the school.
- Harry Potter and the Philosopher's Stone (First mentioned)