In this argument above, the writer recommends that a daily use of Ichthaid will prevent colds and reduce absenteeism based on a report that people in East Meria seldom visit the doctor for because of eating a amount of fish. It seems that his argument is logic at first sight . Under a careful examination, however ,we will reveal how groundless it is.
In the first place, the writer is failing in building a logical causal relationship whether high consumption of fish is the reason for seldom coming down with cold of people in East Meria.
There are many possible alternatives for the lowing ratio of cold. Such alternatives may be the factor of healthy of people in East Meria are in good condition, which make them not easy to be ill, such as people have taken measure to prevent before cold is coming. It is probable that the transportation in East Meria is not very well-situated ,hospitals are far away, which make it difficult for people to see doctor In addition, people in East Meria treat cold as a trivial So, there isno need to drive along to see a doctor.
secondly ,even if high consumption of fish is associated with lowing radio of cold in East Meria, could automatically works effective in every area. The writer ignores an important possibility that city of East Meria is the vicinity of a lake or sea, so people in there could eat fish every day. However, it is far from sea, or no sea or lake around them, we could image how people in that places gain plentiful fish to prevent cold? the writer have failed in considering the true reason behind absences from school and work. Perhaps that some student do not like go to school, they want stay home to play computer game. Or that people have things need to deal in short time. From this respect , claiming cold as a subterfuge will be a good way for not going to school or work.
In short ,, the writer has not provided us with enough evidence to support the advice,. To strengthen the argument, the writer should consider all possible alternatives To better evaluate the memo, we need more information of the proportion of fish oil in Ichthaid.