结论的攻击
说明结论不完美，可以有其他的方法
Finally, the argument fails to consider …(有更好的办法实现目标). Perhaps by…(办法一), or by (办法二), (对目标进行展望) In short, without weighing the suggestion against alternatives, it is unconvincing that (说明提供的方案不好).
赢利考试用书
Finally, even if the families support to build the new seafood restaurant, the restaurant would not necessarily be profitable as a result. Profitability is a function of both revenue and expense. Thus, it is quite possible that the restaurant's costs of obtaining high-quality and healthy seafood or of new promoting restaurant might render it unprofitable despite its popularity. Without weighing revenue against expenses the argument's conclusion is premature at best.
同时叙述两个错误的论据
The memo also makes two hasty assumptions about …(说明两个猜想相关的内容). One such assumption is that …(第一个猜想的情况说明). It is entirely possible that …(反例). Another assumption is that(另外一个错误的猜想) Common sense informs me that (反例)
Furthermore, the difference in the two firms' overall placement time last year does not necessarily indicate that Delany would be the better choice to serve XYZ's laid-off employees. These employees might have particular skills or needs that are not representative of the two firm's clients in general. Besides, one year's placement statistics hardly sufficient to draw any firm conclusions.