Pakistan, Jan. 29 -- Mayhem has erupted on social media ever since PPP chairman Bilawal Bhutto-Zardari proposed a debate between him and PML(N) supremo Nawaz Sharif on a format routinely seen in countries around the globe before the presidential and prime ministerial elections. As younger Sharif urges him to refrain from "taking political rivalries so far" and the entire second team has hopped aboard the sabre-rattling bandwagon, it would do well for everyone to remember that the absence of what Mr Bhutto-Zardari has suggested has repeatedly echoed in our political culture. While these debates seem to have become an endangered species in the likes of the US, there's a lot to televised discussions that zingers and clapbacks. Seeing the can...