OK, I've had a curious thought about mortal memory in the Dresdenverse. The setup behind this thought was remembering a possible book or rumored book coming up in the series. The premise behind the book is Harry goes to sleep and wakes up in an insane asylum. The world he wakes in he is not a wizard, he has no magic, he is just a normal human being. Every one around him is people he knows but are part of this new world. Like Eb is there with him but is a patient too. And Mab, Molly, and Sarrisa are nurses. Just examples of possibilities. And of course this is all in Harry's mind.
So, here is what I'm curious about and wondered what other people's thoughts are. We now have it where Murphy and Hendricks are dead. With Harry's memories being screwed with, if they were to show up in his mind to help out and fight what I would assume would be a mental attack on Harry's mind, would that be breaking the rule of no returning until mortal memory has faded. It would just be Harry's mind they would be, not the real world.