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LSAT Preptest 154, Section 1, Question 18

"In many families adults speak to…"

Explanation

In this question, we're evaluating an argument about the impact of simplified language on language acquisition in children. The argument suggests that using simplified language, such as repeating simple phrases, does not contribute to learning a language more effectively, as evidenced by children in families who don't use this method learning just as well. We need to identify the assumption that underlies this argument for it to hold logically.

A. The argument doesn't hinge on whether babies pay more or less attention to simplified phrases, but rather on the effectiveness of these phrases in language learning.


B. The argument does not suggest that simplified language could impair learning, only that it may not be necessary.


C. (Correct Response) This assumption is implicit in the argument that mastering grammatical structure equates to learning the language. The argument relies on the idea that children who aren't exposed to simplified language and yet learn to speak just as well have effectively learned the language, which presumes a direct link between mastering grammar and language acquisition.


D. The argument does not depend on what linguists believe about simplified language; it's based on observational evidence about language learning in children.


E. The argument isn't about the components required to learn a language (vocabulary and grammar) but about the method of teaching or exposure.

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