LSAT LR Bible- Common Errors of Reasoning !! : GMAT Critical Reasoning (CR)
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# LSAT LR Bible- Common Errors of Reasoning !!

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LSAT LR Bible- Common Errors of Reasoning !! [#permalink]

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07 Oct 2010, 03:13
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Hello Everyone,

Have a question on "Common Errors of Reasoning" as mentioned in LR Bible under FLAW IN REASONING chapter. Will appreciate if you guys can help me out with this confusion.

The text in the book goes like this :
--------------------------------------------------------------------------------------------------------------
Common Errors of Reasoning explained -
1) Uncertain Use of a Term or Concept

As an argument progresses, the author must use each term in a constant,
coherent fashion. Using a term in different ways is inherently confusing and
undermines the integrity of the argument
.

Here is an example:
“Some people claim that the values that this country was built on are
now being ignored by modern-day corporations. But this is incorrect.
Corporations are purely profit-driven enterprises, beholden only to their
shareholders, and as such they can only assess objects based on their
value.”

The term “value” is used in the example above in two different senses: first in a
moral or ethical sense and then in a monetary sense. This shift in meaning
undermines the author’s position
. (I agree till this point).

Here are examples of how this error of reasoning is described in
“depending on the ambiguous use of a key term”
“it confuses two different meanings of the word ‘solve’ ”
“relies on interpreting a key term in two different ways”
“equivocates with respect to a central concept”
“allows a key term to shift in meaning from one use to the next”
“fails to define the term”

This type of answer choice appears more frequently as an incorrect answer than
any other type
. (I don't agree with this statement). Why incorrect ? and what other type ?
--------------------------------------------------------------------------------------------------------------

So, my question is, as expressed in bold in the LSAT text, why these types of answer choices appear as INCORRECT answers? They should be correct answers because Flaw in Reasoning question type requires you find the flaw in the reasoning and these answer choices are doing just that. Moreover, I believe that "Common Errors of Reasoning " as described in LR bible are not restricted to Flaw in reasoning question types, but are general and can apply to any other question type as well.

Please shed some light on this.

Thanks,
-V
If you have any questions
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Re: LSAT LR Bible- Common Errors of Reasoning !! [#permalink]

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15 Oct 2010, 01:38
The errors in reasoning mentioned above can be applied to all types of reasoning questions. According to me, it is basically saying that when you see an ambiguous usage of a word in an answer option you can safely eliminate that option as incorrect. Flaw in reasoning type questions are related to the flaw in the author's argument/conclusion and not specifically to ambiguous use of words.
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Re: LSAT LR Bible- Common Errors of Reasoning !!   [#permalink] 15 Oct 2010, 01:38
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