Why do they say, 'There is no smoke without fire?' Haven't they ever heard of electronic cigarettes? These use a battery to vaporise tiny droplets of nicotine and the resulting steam looks an awful lot like smoke. And what about dry ice machines? There is no fire in them but they produce great clouds of apparent fulginosity. Whilst the very sight of something that looks like smoke is sufficient to cause alarm, it can hardly be fair to automatically assume the cause. Success, this weekend, involves going beyond a prejudice.