Master PC

John had developed the Master PC program which was a combination of reality altering technology and magic.

It could change a person's personality, mind, and body. There were three options:

1) Universal change: John would be the only person to know the person he changed was different, and the person and everyone else would think the person was always that way.

2) Personal change: the person changed would realize she had changed, but only John would know, and everyone else would think she had been that way.

3) Societal change: The person changed would not realize she had changed, but everyone else would realize it.