Today 21st amendment in the Constitution was approved by the National Assembly and the Senate to establish military courts. It was against the constitution to establish a parallel judicial system. So to establish military courts was declared a necessity of the time.
That proved the validity of the Doctrine of Necessity.
Where are those people today who were telling us Doctrine of Necessity has been buried once and for all. They were voting in favor of military courts today. Aitzaz Hassan, Ali Ahmed Kurd, Hamid Khan, Asma Jehangir and many others including TV anchors and so called experts and political analysts besides the politicians who were posing themselves as champion of democracy while they were supporting political chief justice of supreme court.
This is also a proof of failure of present judicial systems and the judiciary.