premise: Twice as many people live till they are 100 in France as in Britain. Yet the two coun- tries have similar sized populations and have diets with similar amounts of fat. In fact life expectancy is considerably better in France from the age of 65 onwards and it seems that lifestyle and diet may have a lot to do with it. Leaving aside the fact that the French probably have the best national health service in the world, statistics suggest that the French remain active longer and consume more units of fruit and vegetables. They also enjoy considerably more glasses of red wine and it seems these differences give rise to far lower levels of death caused by heart disease and this allows significant numbers of people to live until their centenary.
hypothesis: Four differences are attributed to the reason the French have a far lower level of death caused by heart disease: the best national health service, remaining active, consuming more fruit and vegetables and enjoying more red wine.