His answer will be that he is mostly real - in that, the Nelyo Fëanor knows, is now in pieces. His hand remains on the Thangorodrim, for example, as do other smaller parts of him, scattered about Morgoth's accursed realm. But the largest missing piece is, of course, his innocence, yes, his sanity too.

"I am he." or as good as Fëanor will get, unfortunately. Maedhros looks at his father with clear concern before he glances away, ashamed.