Discuss how well reasoned you find this argument. (来源：www.EnglishCN.com)

　　1.From a letter to the editor of a city newspaper.

　　"One recent research study has indicated that many adolescents need more sleep than they are getting, and another study has shown that many high school students in our city are actually dissatisfied with their own academic performance. As a way of combating these problems, the high schools in our city should begin classes at 8:30 A.M. instead of 7:30 A.M., and end the school day an hour later. This arrangement will give students an extra hour of sleep in the morning, thereby making them more alert and more productive. Consequently, the students will perform better on tests and other assignments, and their academic skills will improve significantly."
 
　　2.Butter has now been replaced by margarine in Happy Pancake House restaurants throughout the southwestern United States. Only about 2 percent of customers have complained, indicating that 98 people out of 100 are happy with the change. Furthermore, many servers have reported that a number of customers who still ask for butter do not complain when they are given margarine instead. Clearly, either these customers cannot distinguish margarine from butter, or they use the term "butter" to refer to either butter or margarine. Thus, to avoid the expense of purchasing butter, the Happy Pancake House should extend this cost-saving change to its restaurants in the southeast and northeast as well.
 
　　3.Many employees of major United States corporations are fearful that they will lose their jobs in the near future, but this fear is largely unfounded. According to a recent study, a majority of companies expected to make new hires in the coming year, while fewer companies expected to lay off employees. In addition, although it is very disturbing to be laid off, the proliferation of programs and of workshops designed to improve job-finding skills has made being laid off far less painful than it once was.
 
　　4.In the Bayhead Public Library, books that are rarely borrowed continue to take up shelf space year after year, while people who want to read a recent novel frequently find that the library's only copy is checked out. Clearly, the library's plan to replace books that are borrowed no more than once a year with sufficient copies of more recent books will solve this problem. The protest we have heard since this plan was made public has come from a small, and thus unrepresentative, group of some thirty people and so should therefore be ignored.