“There is a runaway train, on course to kill five track workers, but you can divert it to only kill a single one on another part of the track. What is your choice?” This is the famous question coming from Michael Sandel’s book Justice: What’s the Right Thing to Do? When faced with this question, most people will try to save the five by sacrificing the one.

A similar dilemma happens quite often between Pyongyang and Seoul, and one example would be of a woman who is non-stop in her praise of Pyongyang while still living in Seoul, yet she has not arrested by South Korean authorities.