猫斯基的落单作业ARGUMENT76

猫斯基UID: 2607814

"A group of volunteers participated in a study of consumer responses to the new Luxess face cream. Every morning for a month, they washed their faces with mild soap and then applied Luxess. At the end of that month, most volunteers reported a marked improvement in the way their skin looked and felt. Thus it appears that Luxess is truly effective in improving the condition of facial skin."
Only judging from a mere fact that most volunteers in the group using Luxess face cream reporting that they feel a marked improvement in their facial skin, the writer of this health and beauty article deem that Luxess is truly effective. The apparent reasonable inference actually lacks enough logical supporting, since it is characterized with four flaws, it can hardly stands on a solid ground.
   Firstly, the study is quite dubious. The writer just ambiguously mentioned the study which participated by a group of volunteers, however, little evidence is presented to us whether the selecting the volunteers is random, or that the age class of the volunteers is quite average. Since it is quite possible that in order to get a satisfying result, when selecting volunteers, they only choose those who with good skin conditions however, neglecting those who with sensitive skin or else. Besides, whose who are interested in this kind of study are most young people, perhaps they forget to take kids, middle-aged and elderly people into account. Summing up the above, we can not be convinced that the study is persuading so that what he got from the study is correct or can be generally applied.
  Second, a month is quite a short period of time that contributes little to the credibility of the study. When using a kind of cosmetic, it is a common sense that they take effect gradually, that only a month is quite short for them to show their advantages as well as their side effects. What if after a long time of use, Luxess can cause allergy or other terrible effects, however not exposed in the  study, it is possible that those who buy Luxess an use them over one month will get into skin troubles.
  Thirdly, washing their faces with a mild soap before using Luxess can not exactly illustrate that it is Luxess that causes the improvement rather than that mild soap. It is quite possible that the mild soap they use contribute most to their skin improvement or that only when going with the mild soap can Luxess increase their skin condition, however, when using Luxess alone, it has no effect at all. Further, the writer does indicate whether the volunteers use other kind of methods to protect their facial skin during the study. If they use other cosmetics or just because they pay attention to their daily diet, it can rule out that Luxess is the main reason causing their skin improvements?
  Last but not the least, the writer provides little evidence to persuade us that Luxess can be applied to all the people. Neglecting the classifications of people' skin faces (including dry, oil and mix and so on), the writer can not be so casual to say that it can improve the condition of facial skin of all the people. Even assuming that Luxess is quite effective, but what if those who take part in the study have the same type of skin, then it can not indicate that Luxess is adaptable for other people.
  By and large, the writer lacks enough evidence in persuading us that Luxess is truly effective or worth buying. In order to get a comprehensive conclusion, the writer should first make a effective study, which means that he should make sure those volunteers are really typical and the process is convincing, time is suitable and so on. Then after they get a comprehensive response from those who use Luxess for a long time can they really conclude that whether Luxess is really effective or not.