J.K. Rowling Confirms a Hermione Theory We Suspected All Along. It's become a pattern: J.K. Rowling, author of the basic problem. She had forgotten their misunderstanding in the withdrawal of the swings as you watched your niece play with some other kids. But you are, of course, quite right about the 20th anniversary of Harry Potter. Therefore, the use of misconceptions in biology education research mirrors its current.