请教个A的逻辑问题 高手请进

kay8815UID: 2668603

1，在写Argu的时候会发现，如果前面有个错误因果，后面又有个类似的错误，那反驳他们的他因法就会重复，即使你想出别的他因，我总觉得在逻辑上论述的还是同一种东西
例如A35这题。
"Salicylates are members of the same chemical family as aspirin, a medicine used to treat headaches. Although many foods are naturally rich in salicylates, for the past several decades food-processing companies have also been adding salicylates to foods as preservatives. This rise in the commercial use of salicylates has been found to correlate with a steady decline in the average number of headaches reported by participants in our twenty-year study. Recently, food-processing companies have found that salicylates can also be used as flavor additives for foods. With this new use for salicylates, we can expect a continued steady decline in the number of headaches suffered by the average citizen of Mentia."
讲水杨酸的。
1.水杨酸和阿司匹林不一样
2.水杨酸商业用途导致头疼减少？
      1.别的原因：当地人生活习惯变化
      2.医疗技术上升，大家都注意保健
3.文章说还会稳步下降
    别的因素可能会导致上升的，比如，当地人生活节奏加快，人的健康水平下降之类。（这里我可以换成其他说法，比如别的食品添加剂还可能使头疼上升呢，或者人吃多了产生抗药性了。但是我总觉得这两点在说同一件事）
有人帮我理理顺么？谢谢

kay8815UID: 2668603

自己顶

showkidUID: 2427308

35. The following appeared in the summary of a study on headaches suffered by the residents of Mentia.
"Salicylates are members of the same chemical family as aspirin, a medicine used to treat headaches(前提1). Although many foods are naturally rich in salicylates, for the past several decades food-processing companies have also been adding salicylates to foods as preservatives(前提2). This rise in the commercial use of salicylates has been found to correlate with a steady decline in the average number of headaches reported by participants in our twenty-year study(推论1). Recently, food-processing companies have found that salicylates can also be used as flavor additives for foods(前提3). With this new use for salicylates, we can expect a continued steady decline in the number of headaches suffered by the average citizen of Mentia (结论)."

逻辑链：
前提1 前提2 推 推论1 （隐含推论，S和A功能相同）
推论1 前提3 得出 结论（隐含假设，厂家会使用S来生产食品）

错误：
一、前提1 前提2 推 推论1：
a)隐含推论：S和A不同物质，功能可能不同，没有证据表明这点。
b)前提二恰恰提供了一个反证。我们可以这样推测出这种可能：数年前的食品已经含有足够的S，但是那个时候头疼发病率较高，恰恰说明S极有可能与头疼无关
二、推论1 前提3 得出
结论：
a)即便承认S与头痛相关，但是相关不等于决定。头痛症数量的多少影响因素很多。如。。。。
b)另外，A可以用来做食品香料，并不代表厂家一定会用它来做香料。

PS，仅供参考。