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19. The following appeared as part of an article in the travel section of a newspaper. Over the past decade， the restaurant industry in the country of Spiessa has experienced unprecedented growth. This surge can be expected to continue in the coming years， fueled by recent social changes： personal incomes are rising， more leisure time is available， single-person households are more common， and people have a greater interest in gourmet food， as evidenced by a proliferation of publications on the subject. Discuss how well reasoned.。. etc. Recent social changes in the country of Spiessa lead the author to predict a continued surge in growth of that countrys restaurant industry. Rising personal incomes， additional leisure time， an increase in single-person households， and greater interest in gourmet food are cited as the main reasons for this optimistic outlook. All of these factors are indeed relevant to growth in the restaurant industry; so the prediction appears reasonable on its face. However， three questionable assumptions operative in this argument bear close examination. The first dubious assumption is that the supply of restaurants in Spiessa will continue to grow at the same rate as in the recent past. However， even in the most favorable conditions and the best of economic times there are just so many restaurants that a given population can accommodate and sustain. It is possible that the demand for restaurants has already been met by the unprecedented growth of the past decade， in which case the recent social changes will have little impact on the growth of the restaurant industry. | 
