" Is there some amazing rational thing you do when your mind's running in all different directions?" she managed.

"My own approach is usually to identify the different desires, give them names, conceive of them as separate individuals, and let them argue it out inside my head. So far the main persistent ones are my Hufflepuff, Ravenclaw, Gryffindor, and Slytherin sides, my Inner Critic, and my simulated copies of you, Neville, Draco, Professor McGonagall, Professor Flitwick, Professor Quirrell, Dad, Mum, Richard Feynman, and Douglas Hofstadter."

Hermione considered trying this before her Common Sense warned that it might be a dangerous sort of thing to pretend. "There's a copy of me inside your head?"

"Of course there is!" Harry said. The boy suddenly looked a bit more vulnerable. "You mean there isn't a copy of me living in your head?"

There was, she realized; and not only that, it talked in Harry's exact voice.

"It's rather unnerving now that I think about it," said Hermione. "I do have a copy of you living in my head. It's talking to me right now using your voice, arguing how this is perfectly normal."

"Good," Harry said seriously. "I mean, I don't see how people could be friends without that. "

― Eliezer Yudkowsky