Public reasoning is critical for a democracy, economist and Nobel Laureate Amartya Sen said today, launching into sharp criticism of Prime Minister Narendra Modi's government. In an interview to NDTV at the launch of his book 'Collective Choice and Social Welfare: Expanded Edition', Dr Sen condemned the violence on the campus of Delhi University's Ramjas college, calling it "wholly anti-democratic"."To say we can't discuss a certain point of view even before the discussion begins is highly dangerous," he said. After clashes between students on Wednesday over an invitation to Jawaharlal Nehru University student Umar Khalid, accused of sedition over an event last year where anti-India slogans were allegedly raised, junior Home Minister Kiren Rijiju said colleges cannot be allowed to become "hub of anti-national activity".