Have you ever wanted to change your past? Well you can’t change the past you experienced, but that has only a tiny influence on your possible futures. What you can change are your possible pasts. Why would you want to do that you ask? Because your possible futures and their probabilities are determined by your possible pasts and their probabilities. If you change the probabilities of your pasts, you change the probabilities of your future!
Imagine yourself again in the big white room and instead of looking forward, rotate your chair around and look backward into your past one year ago. You will see a selfie that represents the universe you experienced, but you will also see selfies representing the universes you didn’t experience.