I want to know the answer to the following question:
Where was Avicenna once imprisoned?
All the background I'm provided with is that "While he was imprisoned in the castle of Fardajan near Hamadhan, Avicenna wrote his famous "Floating Man" – literally falling man – thought experiment to demonstrate human self-awareness and the substantiality and immateriality of the soul.". Is that enough to answer the question?
Answer: yes