People get really annoyed when someone undeserving gets favorable treatment. So, stronger students will not take the chance to let weaker students copy their a

People get really annoyed when someone undeserving gets favorable treatment. So, stronger students will not take the chance to let weaker students copy their assignments. Penalize both equally, and a group mentality makes it more likely that they will take a chance again... at least, that's how I understand it worked out.