Overtaken by events but maybe useful. Yesterday's column was to some extent behind the news, being unable to take account of developments in the evening, including Mr Papandreou's decision to cancel the national referendum on Greece's remaining in the euro. Yet I am not unhappy that it was published despite this time lag. The reason is that some of the points I raised have not been brought up elsewhere and perhaps remain useful. Some points remain valid no matter how things develop (points A...