lsat-3-4-17

simion

Zelda: Dr. Ladlow, a research psychologist, has convincingly demonstrated that his theory about the determinants of rat behavior generates consistently accurate predictions about how rats will perform in a maze On the basis of this evidence; Dr. Ladlow has claimed that his theory is irrefutably correct.

Anson: Then Dr. ladlow is not responsible psychologist. Dr. ladlow’s evidence does not conclusively prove that his theory is correct. Responsible psychologists always accept the possibility that new evidence will show that their theories are incorrect.

17. Which one of the following can be properly inferred from Anson’s argument?

(A) Dr. Ladlow’s evidence that his theory generates consistently accurate predictions about how rates will perform in a maze is inaccurate

(B) Psychologists who can derive consistently accurate predictions about how rats will perform in a maze from their theories cannot responsibly conclude that those theories cannot be disproved

(C) No matter how responsible psychologists are, they can never develop correct theoretical explanations.

(D) Responsible psychologists do not make predictions about how rats will perform in a maze

(E) Psychologists who accept the possibility that new evidence will show that their theories are incorrect are responsible psychologists.

此题我用排除法选b，对了。但它的推导及意义很是不解

robertchu

Let's paraphrase Zelda and Anson's words:

Zelda:  Dr. ladlow is a "psychologist who can derive consistently accurate predictions about how rats will perform in a maze from his theory".  Ladlow concludes that his theory cannot be disproved.

Anson: Then Dr. ladlow is not responsible psychologist.  ... Responsible psychologists always accept the possibility that new evidence will show that their theories are incorrect.

Now you can see that B, "Psychologists who can derive consistently accurate predictions about how rats will perform in a maze from their theories cannot responsibly conclude that those theories cannot be disproved." is a generalization inferred from the paragraph.

Alternatively you can also use "deny test" for this kind of inference question.  Deny a answer choice, see whether the result directly contradicts with the original passage.

simion

deny test！好方法，高手。我还有一个问题，归纳题是否都可以用此方法呢，还是只有标infer的可以用。

lawyer_1

1。这是MUST BE TRUE题，就是根据原文，那个选项一定对。B可以看成两部分，对心理学家的描述其实是Z说的心理学家。后面部分其实是A的观点。所以B对

2。建议对MUST BE TRUE题不用DENIAL TEST。DENIAL TEST只在假设题中用。

Bensontuo

simion 发表于 2004-12-24 15:41
Zelda: Dr. Ladlow, a research psychologist, has convincingly demonstrated that his theory about the  ...

Spot the question type: Method of the reasoning - Infer / Must be true

Z: Theory is correct ---> determinants of rat behavior as the theory generates consistently accurate predictions of how rats will perform in a maze

Contrapositive:

Determinants of rat behavior as the theory does not generate consistently accurate predictions ( might be inconsistent ) ---> Theory is not correct.

A: Doc of the theory is not responsible psychologist ---> evidence does not conclusively prove the theory is correct ---> dose not accept the possibility that new evidence will show the theories are incorrect.

So apparently, A believes that the Doc of the theories does take for granted that as long as it generates consistently accurate predictions, it must be correct without taking any consideration that it might be disprove by new evidence, and by the action of it, Doc is not a responsible psychologist.

A. A does not say it is " inaccurate "; instead, A does say that there might be possibilities that it might be " inaccurate "

B. P can not responsibly conclude that the theories cannot be disapproved. ( correct answer )

C. Who is to say that they can never develop correct theories ? what we are discussing here is to accept the possibilities the correct ones might be disproved if new evidence kick in.

D. Not relevant

E. Mistaken Negation - The original argument is " If do not accept, they being irresponsible.

So, If being responsible, they must accept. However, as to E, E said,  If do accept, they must be responsible