In order to convince them otherwise, you would (at a minimum) have to run multiple world sims, not just multiple placements in one world. You would also have to forcibly give them sufficiently rational thought processes that they could interpret the evidence you forced upon them

Disagree. A simple classroom lesson is often sufficient to get the point across:

http://www.uen.org/Lessonplan/preview.cgi?LPid=536

Discrimination REALLY sucks.