Who is actually crazy?

Fraulein Doktor von Zahnd has been eavesdropping on the men's conversations from beginning to end. She also reveals that she has known Mobius' true identity for many years and has been secretly copying his research documents, and using his discoveries to construct a global empire of her own. She believes that King Solomon himself is speaking directly to her and he will be guiding her in the use of Mobius' discoveries so that she will become the most powerful person on earth.