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# The general availability of high-quality electronic scanners

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Manager
Joined: 01 Feb 2015
Posts: 57

Kudos [?]: 5 [0], given: 37

The general availability of high-quality electronic scanners [#permalink]

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20 Aug 2017, 20:06
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kinjiGC wrote:
The general availability of high-quality electronic scanners and color printers for computers has made the counterfeiting of checks much easier. In order to deter such
counterfeiting, several banks plan to issue to their corporate customers checks that contain dots too small to be accurately duplicated by any electronic scanner currently available; when such checks are scanned and printed, the dots seem to blend together in such a way that the word "VOID" appears on the check.

A questionable assumption of the plan is that :

Conclusion : To void counterfeiting, banks are using small dots which cannot be duplicated accurately by the scanners.

Questionable assumption -> Is any assumption of the argument. So essentially the question is asking for assumptions.

A. in the territory served by the banks the proportion of counterfeit checks that are made using electronic scanners has remained approximately constant over
the past few years
We need to find the option which supports the conclusion. This option is giving a general observation which doesn't concern the argument. Whether proportion of checks has remained constant or not is immaterial.

B. most counterfeiters who use electronic scanners counterfeit checks only for relatively large amounts of money
Small amount of money or big sums of money is not the scope of the argument. The Scope of the argument is about counterfeiting the checks.

C. the smallest dots on the proposed checks cannot be distinguished visually except under strong magnification
The argument concerns with the scanners. If suppose dots are visible or not under strong magnification is not context of the argument. The context of the argument is whether scanners can read the reproduce the small dots.

D. most corporations served by these banks will not have to pay more for the new checks than for traditional checks
Cost of the security measure is not in the context of the argument.

E. the size of the smallest dots that generally available electronic scanners are able to reproduce accurately will not decrease significantly in the near future.
This option says size smallest dot that scanners can read and reproduce is going to remain unchanged and this is the assumption because if this is not the case, the scanners can read and reproduce the small dots and doing so breaks the argument and hence this is the assumption - Correct

I am not clear on this one. Here is my understanding:

We are being asked for a questionable assumption. Is an assumption = questionable assumption? How?

Doesn't a questionable assumption mean an assumption/statement that can be questioned upon / weakness to the conclusion?

If I assume that my understanding is correct, I am able to reach E. But, if we are actually looking for an assumption, then how can E be an assumption?
E says - Size of the smallest dots will not decrease (but we actually want them to decrease further and make the dots small in order to accord to the plan - if it has be an asssumption. Is that not correct? - yes, it is not correct. why would you want to decrease the size of the dots and accord to the plan be able to duplicate the dots and allow counterfeiting? Understood that E is an assumption.)
Question says - the plan is to make the dots soo small that it cannot be reproduced by current scanners.

However, option C says - Smallest dots can be seen by magnification (this acts as a strengthener, not as an assumption though - Is this correct? No, it isn't. To avoid counterfeiting, it can be assumed that these small dots cannot be distinguished/seen in anyway. What I mentioned earlier is a weakener in fact, not strengthener).

Understood after some contemplation. Mistake was:
What did the question say? to avoid counterfeiting, plan is to make the dots smaller so that it cannot be duplicated by the current available scanners
What did I interpret? To avoid counterfeiting, Need to look for an option that makes the dots smaller. [WRONG] Making the dots smaller by currently available scanners will allow counterfeiting (contradictory).

This question still remains: Questionable assumption = Assumption, not weaken. How?

Kudos [?]: 5 [0], given: 37

Manager
Joined: 13 Mar 2013
Posts: 179

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Location: United States
GPA: 3.5
WE: Engineering (Telecommunications)
Re: The general availability of high-quality electronic scanners [#permalink]

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12 Sep 2017, 23:54
Ans to this question should be C and not E .

Option E says :
the size of the smallest dots that generally available electronic scanners are able to reproduce
accurately will not decrease significantly in the near future

Its talk about the accuracy of the scanner that available in the market at present . Future scope is the size will not be decrease to gaze the correct size of the smallest dot .

But in the argument it is given that size of the dot is decreased . Hence it is not possible for the scanner currently available in the market to spot it and produce fake checks .

Hence E is wrong .

Lets check C
the smallest dots on the proposed checks cannot be distinguished visually except under
strong magnification

Under the naked eye it not possible to check but under strong magnification . It is possible to check the dots .
Hence idea of introducing new Check will not meet the proposed plan .

Hence C is correct ans .

Regards,

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Kudos [?]: 75 [0], given: 25

Re: The general availability of high-quality electronic scanners   [#permalink] 12 Sep 2017, 23:54

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