J.K. Rowling doesn’t back down from voicing an opinion, especially when it comes to politics. It doesn’t hurt that many fans view her imaginary Harry Potter world as connected to political events—namely, those surrounding President Donald Trump.

On Monday, she took to Twitter to clarify an important point about the First family—and the magical school of Hogwarts—prompted by a sarcastic tweet from a writer named Oliver Willis. In his tweet, Willis suggested that Donald Trump, his newly promoted senior adviser Jared Kushner, and his sons Donald Trump, Jr. and Eric Trump were all alumni of Slytherin. (Slytherin is known for producing Dark wizards of unusual cunning, like Lord Voldemort, as well as proud and ambitious leaders like Merlin.)

But Rowling disagreed that Trump, Kushner, and the rest of the crew would be sorted into the same home as Tom Riddle, the Malfoy family, and Severus Snape. In fact, as her response made clear, she doesn’t see Trump or his family members as belonging to Hogwarts at all. According to Rowling, they’re Muggles who woudn’t been invited to Hogwarts: they wouldn’t have even received Hogwarts acceptance letters to begin with.

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Write to Raisa Bruner at raisa.bruner@time.com.