1. How did she feel when she discovered that Jikji was the oldest known book printed using movable metal type?
2. Why did she continue to persist in her search for the true value of Jikji even in the face of the challenges posed by the National Library of France?
3. If you were an employee of the National Library of France like Park Byeong-seon, do you think you would have continued your historical investigation of Jikji? Why or why not?