EVEN though the presidential and vice-presidential debates are still three months away, Rachmini Rachman alias Mien Uno is teaching her son, Sandiaga Salahuddin Uno, how to win over viewers. For instance, she reminds him to always be polite at events. “Don’t use language like you are debating an issue with your friends. You must be polite, so that people will sympathize with you,” said Mien, on Thursday last week, repeating her