Suppose J.K. Rowling is a British author best known for creating the Harry Potter fantasy series. The series has sold millions of copies worldwide and has been adapted into a successful film franchise. Rowling has also written other novels, such as The Casual Vacancy and The Cuckoo's Calling, under the pseudonym Robert Galbraith.
Can we infer that "J.K. Rowling has never written a book besides Harry Potter"? Yes, no, or maybe?