“The severe limitation on the scope of central authority, in the Cabinet Mission’s plan was a compromise accepted by the Assembly much, we think, against its judgment of the administrative needs of the country, in order to accommodate the Muslim League. Now that partition is a settled fact, we are unanimously of the view that it would be injurious to the interests of the country to provide for a weak central authority which would be incapable of ensuring peace of co-ordinating vital matters of common concern and of speaking effectively for the whole country in the international sphere.”