LSAT-18-2-6

6. A linguist recently argued that all human languages must have a common origin because some concepts are universal; that is they appear in all languages. For example, all languages are capable of describing lightness and darkness.

Which one of the following, if true would most seriously weaken the argument?

(A) The Burmese language does not contain basic nouns like automobile and airplane.

(B) No one linguist could possibly speak all known languages.

(C) All speakers, regardless of their languages are confronted with similar stimuli like lightness and darkness.

(D) The similarity between human language and dolphin language has not been attributed to a common origin.

(E) Some languages include concepts of which speakers of other languages are not even aware.

答案C，

能讲讲思路嘛？我觉得E也不错啊。

all language confront common oringin——》some concept are universal（light VS dark）

some language 有些概念别的language甚至没有意识到、weaken了啊。这里说概念没有认识到，就不能说universal了呀

linguist认为所有人类语言来自一个源头，原因是各语言里都有对某些concept的描述，如lighting and darkness

这种削弱只要切断因果关系链就可以了，即虽然各语言都有描述，但只是因为所有人都会遇到此类事务，并不能就此推理所有人类语言来自一个源头

注意E实际上是将语言这个概念缩小了，题目中说得是all human languages,而E却是Some languages include ..,即使确有其事，也不能对全题削弱

hope it helps。。。