"I cannot, of course, force you to listen to me; in fact, I have great admiration for your ability to not listen and not have thoughts, I do not think I could do it. However. Consider the hypothetical where I am a powerful mage and leader of an army in another world, and I am horrified by Melkor's actions and wish to stop him. I have made some progress on the problem of interworld travel using our local magic, but now I am stuck on the fact that...well, even if you have honestly reported your beliefs to us, since you think there is no point concealing from your enemy things that you already knows, we have secondary confirmation that he has substantially altered your memories, and - this could mean that our information on Arda is faulty."
"...Nayoki is a Mindhealer, as she may have mentioned to you before. She has an idea on how to retrieve the memories that Melkor erased. I - would far prefer to attempt this with your consent and cooperation, but given your epistemic position I cannot expect that, and - the situation may be time sensitive, I have no way of knowing from here if Melkor is close to winning and weeks or months would make it too late. And - I can do math. I am fully aware that it will cause you further trauma to do this, but - many other lives are at stake, worlds may be at stake, and you are one person. So Nayoki is going to do her best to undo the memory erasure, so that we can determine if the memories of Arda you have drawn on to answer our questions are themselves fabricated."
His lips twitch. It's not a humorous expression at all. "I understand entirely if you think I am Melkor or Thauron, and therefore doing this...because I am evil and it entertains me, I suppose..."
He nods to Nayoki.