I like the idea of deleting files of memory. I use to tell my kids when they were growing up that I could do this at will. They would ask "how do you do that?" The only way I could describe it was going back to a scene from Harry Potter. It is where Professor Dumbledore takes memories out of his head with his wand and places them in a crystal ball. I would make the motion of just taking them out and puff it's gone. That easy. Since I worked in healthcare I would always make a joke about having self inflicted dementia. :)