Let me pitch you a setting: The year is 2015 and a team of scientists are trying to create a device that allows a person to "Save" right before a major event (in this case, a job interview).
Let's say the job interview resulted in you not being hired. Normally you would have to accept this fact and move on. HOWEVER if you had a "Save Drive" (name of device that gives you the powers of "Saving" and "Loading"
If you don't understand what I mean by "Saving" and "Loading" please refer to
Note: A person in possession of a Save Drive can save ANYWHERE and is not bound by the concept of "Save Points"
So, to restate my question: How do I scientifically explain the concept of "Saving" and "Loading"?