Preparatory phases. Greece's woes are an example of the difficulties EU countries have in living alongside each other if they don't all stick to the common rules. However, it's not yet decision time; we are still in the preparatory phase. The question as to whether a eurozone country can leave it and under what conditions remains open and opinion is, furthermore, highly divided on the issue: some say that membership of the euro is irrevocable and others argue that a departure from it is an...