Suppose Harry Potter and the Sorcerer's Stone is the first book in the Harry Potter series written by J.K. Rowling. It follows the story of a young boy, Harry Potter, who discovers he is a wizard and attends Hogwarts School of Witchcraft and Wizardry.
Can we infer that "J.K. Rowling wrote all seven Harry Potter books in one year."? Yes, no, or maybe?