lsat15-IV-13

jw

13. "addiction" has been defined as "dependence on and abuse of a psychoactive substance" Dependence and abuse do not always go hand in hand, however. For example, cancer patients can become dependent on morphine to relieve their pain, but this is not abusing the drug. Correspondingly, a person can abuse a drug without being dependent on it. Therefore, the definition of "addiction" is incorrect.

The relevance of the example of cancer patients to the argument depends on the assumption that

(A) cancer patients never abuse morphine

(B) cancer patients often become dependent on morphine

(C) cancer patients who are dependent on morphine are addicted to it

(D) cancer patients who abuse a drug are dependent on it

(E) cancer patients cannot depend on morphine without abusing it

why C not A?

zyh79

结论是：addiction定义不准确。它既要dependence，又要abuse
反驳的证据：cancer patients 有dependence，但没有abuse。
证据要与结论相关，要这样的假设：cancer patients 有dependence的为addiction
答案A不是假设，只是把证据内容又强调了一下。