The largest functional democracy in the world that we take pride in, has proved successful because of the exceptional contribution made by Pt. Jawaharlal Nehru and his like. <br/><br/>The inherent concept of debate, discussion and decision make Parliamentary democracy vibrant, acceptable and functional. President Pranab Mukherjee said this delivering Pt. J L Nehru memorial lecture in Kolkata this evening. Permanent disruption of Parliamentary process has been never heard of, he added.<br/><br/>Addressing a large gathering of invitees as chief guest at the concluding function of the year-long 125th birth anniversary celebration of Pandit Nehru organized by Bidhan Memorial Trust, Mr. Mukherjee said laying the pillars of Indian democracy and consolidating ?its? parameters by developing all the safe-guarding institutions in his 17 year-long premiership is but one aspect of Nehru's outstanding personality.