The Scottish National Party has shredded the infinitely complacent declarations of September 19, 2014

IT didn't take long to turn a world upside down. Just 231 days passed between a vote designed to settle everything and a vote proving that nothing is settled. The referendum was supposed to draw a last, definitive line under Scotland's binary arithmetic. Instead, tricky calculations are being scribbled furiously this weekend on creamy House of Commons notepaper.