第二层:To support this conclusion the writer cites…/points out that…
第三层:However, this argument suffers from several critical flaws and is therefore unconvincing/ unpersuasive as it stands.
第二段和第三段甚至第四段:分类别去攻击各个逻辑错误。(以因果关系类错误为例)One problem with the argument is that, the editorial observes a correlation between… and …, then concludes that the former is the cause of the latter. However, the editorial fails to rule out other possible explanations for…For example,… Any of these factors, or other social, political or economic factors, might lead to…Without ruling out all other such factors it is unfair to conclude that…