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标题: [求助]feifei-97:有关充要条件的疑问。 [打印本页]

作者: xiaoxique89    时间: 2009-11-14 07:28     标题: [求助]feifei-97:有关充要条件的疑问。

97. A scientific theory is a good theory if it satisfies two requirements: it must accurately describe a large class of observations in terms of a model that is simple enough to contain only a few elements, and it must make definite predictions about the results of future observations. For example, Aristotle’s cosmological theory, which claimed that everything was made out of four elements---earth, air, fire, and water---satisfied the first requirement, but it did not make any definite predictions. Thus, Aristotle’s cosmological theory was not a good theory.
           


 


If all the statements in the passage are true, each of the following must also be true EXCEPT:


 


A.       Prediction about the results of future observations must be made by any good scientific theory

B.        Observation of physical phenomena was not a major concern in Aristotle’s cosmological theory.

C.        For elements can be the basis of a scientific model that is simple enough to meet the simplicity criterion of a good theory.

D.       A scientific model that contains many elements is not a good theory.

E.        Aristotle’s cosmological theory described a large class of observations in terms of only four elements.


 


After analysis , we can find that the reasoning in this argument is that:

 

1>      it must accurately describe a large class of observations in terms of a model that is simple enough to contain only a few elements  and  2> it must make definite predictions about the results of future observations.?à A scientific theory is a good theory

 

So , we can find all of choices except B satisfied with the original meaning.

 

B is not mentioned in this argument , so we can conclude whether B is also true.

 

So B is the best answer.


根据原题第一句话:如果科学理论是个好理论,那它满足两个条件:其中第二条:it must make definite predictions about the results of future observations。对选项A有疑问:1.题目说是definite predictions,A是 predictions,这能等同吗?2.也是最疑惑的,满足两个要求是好理论,也就是说好理论能够有明确的推断。A中说推断来自好理论?这个推理过程有问题吧。Prediction about the results of future observations must be made by any good scientific theory 这句话该怎么理解?


作者: daizexia92    时间: 2009-11-14 21:09

我觉得这个也是咱们英语非母语的原因了吧,如果加个definite在前面肯定就不会选A了呵呵,至于有和没有definite是否等同的问题我其实也和你同样抱怀疑观点,这个地方确实有质疑

或者也可以这么理解?如果要把prediction分成两种一种是definite一种不definite,那不definite的还叫prediction么?比如我说明天既有可能下雨也可能不下雨,这还叫预测么?如果从这个角度来理解,prediction一定就是definite的,所以可以视为等同

再有觉得A有问题也可能是因为我们常识的影响,我们觉得破理论也能做出预测,只不过一般不准罢了,我的建议是做逻辑题的时候紧盯着题目给的信息,其他常识就暂时忘掉,死跟着题目给的逻辑,题目说是什么,就是什么,为了得分唉唉唉……那么,如果要忘记常识只看题的话,题目中说了,亚里士多德的理论没有预测,所以不是好理论,那么没有预测的一定不是好理论,所以只有好理论才有可能有预测,那么就能推出预测都是来自好理论的(再次强调,忘记常识)

其实说这么多我感觉简直太啰嗦了,在考场上我觉得看到B基本上一定会选B,因为A虽然有质疑,但是B相对来说更明显的不对。anyway,希望你同意我的观点~


作者: xiaoxique89    时间: 2009-11-15 06:59

先谢ls。definite不是问题的关键。 a good theory -〉it must make definite predictions about the results of future observations。可是A中说什么?Prediction about the results of future observations must be made by any good scientific theory ,这个推理好像是错误的吧?
作者: daizexia92    时间: 2009-11-15 07:09

那么,如果要忘记常识只看题的话,题目中说了,亚里士多德的理论没有预测,所以不是好理论,那么没有预测的一定不是好理论,所以只有好理论才有可能有预测,那么就能推出预测都是来自好理论的

作者: xiaoxique89    时间: 2009-11-16 07:04

恩。脑筋有点打结了。现在好了。看来还是自己阅读能力的问题。谢谢!





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