We know that if memory is destroyed in one part of the brain, it can be sometimes re-created on a different part of the brain. And once we can unravel that amino chain of chemicals that is responsible for memory, I see no reason why we can't unlock it and, essentially, wipe out what's there.
When the 'Seinfeld' show said it was going to be a show about nothing, everybody said it couldn't - wouldn't work. It did. 'Thor' is about something, about that character finding his destiny, but it's not doing what was expected... and yet it's doing very well.
