“The British government has no intention of walking out of the European Union,” you argue, “but Britain could end up falling out” (“How Britain Could Leave Europe,” December 17, 2011). Nicely put. The fractious Brussels summit a fortnight ago leaves a whole bunch of possibilities open, and Britain might indeed find itself bereft of the Union. This prospect is too far-fetched at the moment to contemplate it in any detail, but it is still good to keep it in mind. As well as to consider it on the bright side. As suggested by Nicolas Sarkozy, the French president, the City of London could be turned into something like the Cayman Islands. Of course, as noted by Mark Rutte, the Dutch prime minister, this would give Britain a handsome competitive advantage in global financial affairs. Well, David Cameron, the struggling British prime minister, might be onto something, after all. Behold, with a little help from his clever European friends, he might even let Britain fall out of the Union. Oopsy daisies!