Merely based on unfounded assumptions and dubious (suspicious) evidence, the statement draws a conclusion that_____. To substantiate (support) the conclusion, the arguer points out evidence that_____. In addition, he indicates that_____. (Furthermore, he cites the result of a survey in support of his recommendation). At first glance, the author’s argument appears to be convincing, but further reflection reveals that it omits some essential concerns that should be addressed to substantiate the argument. From my point of view, this argument suffers from 2/3 major logical flaws.
To sum up, this arguer fails to substantiate his claim that_____, because the evidence cited in the analysis does not lend strong support to what the arguer maintains. Therefore, if the argument had included the given factors discussed above, it would have been more thorough and logically acceptable.
A. quantity of the sample 样本数量不足
B. representativeness of the sample 样本代表性不足