This argument claims that Nature's Way should build the next new store in Plainsville, because the author believe that the stores are most profitable in areas where residents are highly concerned with leading healthy lives and Plainsville has many such residents. To support this conclusion, the author points out three pieces of truth. However, this argument suffers from several critical flaws.
First of all, the report that sales of running shoes and exercise clothing are at all-time highs is worth questioning. Does it involve the majority of stores selling running shoes and exercise clothing? Perhaps, the report is written by sellers of running shoes and exercise clothing, just after investigating those stores which have good sales, in order to attract more customers. Ever if the report is reliable, those who by running shoes and exercise clothing may have no interest in health food, they may just care about sports rather than food. Therefore, this report has not enough persuasion to let readers convince.
Sencondly, the author points out that the local health club which nearly closed five years ago due to lack of business, has more members than ever, and the weight training and aerobics classes are always full. Maybe the author wants to gain a result from this truth that the recovery of the club is because of many residents who are concerned with healthy lives. However, the author fails to consider several other factors. The improvement of exercise equipment, better management and attractive advertisement are all useful to fetch more and more customers.
Thirdly, the author anticipates a new generation of customers who are required to participate in a "fitness for life" program in Plainsville's schools. The author assumes that schoolchildren are concerned with healthy because they are emphasizes the benefits of regular exercise at an early age. However, the author provides no evidence to substantiate this assumption. Only when the author can provide a reliable, specific report about this phenomena is it likely that the company will consider the opening of the next new store.
To sum up, the conclusion lacks enough reasonable evidences to support. To strengthen the argument, the author should carry on further investigation to gain more convictive conclusion.