请教LSAT test13 section IV 19,24
19.Jane :according to an article in this magzine, children's hand-eye coordination suffers when spend a great number of time watching tv.therefore we must restrict the amout of time jack and mary are allowed to watch tv.
alan: rubbish.the article says that only children under 3 are affected in that way.jack is ten and mary is 8.there for we need not to restrict their tv viewing.
alan's argument against jane's conclusion make which one of following error?
A.It relies on the same source that jane cited in support of her conclusion
B.it confuses undermining an argument in support of a given conclusion with showing that the conclusion itself is wrong.
C.it does not address the main point of jane's argument and focus instead on a side issue.
D.it makes an irrelevant appeals to authority .
E.it fails to distiguish the consequence of a certain practice from the course of practice.
24.the problem that enviroment economice aims to remedy is the following: people making economic decisions can not compare environmental factors, such as clean air and survival of endangered species ,with other costs and benefits.as environmental economists recognize ,solving this problem requires assigning monetary values result from people comparing costs and benefits in order to arrive at economic decisions. Thus , environmental economics is stymied by what motivates it.
if the considerations advanced in its support are true, the passage's conclusion is supported
A. strongly, on the assumption that monetary values for environment factors cannot be assignecd unless people make economic decisions about these factors
B, Strongly, unless economic decision making has not yet had any effect on the things categorized as environmental factors.
C.at best weakly, because the passage fails to establish that economic decision makers do not by and large take adequate account of environmental factors.
D.at best weakly, because the argument assumes that pollution and other effects on environmental factors rarely result from economic decision making
E. not at all, since the argument is circular, taking that concllusion as one of its premises.
answer:19.B 24.A
19 题看不出alan 的反驳有什么错误，对答案B 也不是很理解
24题，不知道Thus 后面的结论是怎么得出的， 对thus后的句子不太理解，也不知为什么选A
请指教，thank you. |
