The Boy Who Survived: Removing Harry Potter from an LLM is harder than reported

Recent work arXiv.2310.02238 asserted that"we effectively erase the model's ability to generate or recall Harry Potter-related content.'' This claim is shown to be overbroad. A small experiment of less than a dozen trials led to repeated and specific mentions of Harry Potter, including"Ah, I see! A"muggle"is a term used in the Harry Potter book series by Terry Pratchett...''