CR -- iris scanner

Question

A technology company plans to develop a prototype laptop that uses iris scanners that can distinguish one user from another. The inventor of this laptop claims that it will reduce insurance and security costs at offices, as only authorized users will be able to turn on the laptop, making it a less appealing target for thieves.

Which of the following, if true, most supports the company's implementing its plan to develop the prototype?

A) There is considerable variation in the color and patterns present in most people's irises.

B) The size of people's irises tends to change noticeably over the course of the day.

C) In-person security services will not suffer from technological glitches when allowing access to laptops.

D) Colored contacts allow people to change their eye color, without altering any of the other characteristics of their iris.

E) Insurance and security companies provide other services to companies in addition to protecting laptops.

dear Magoosh experts,
I am sunk in A ,C and D. genuinely want your help to point out my fault

here is my reasoning..
at the beginning of the argument, a technology company PLANS to .... the conclusion mentioned the advantage of the plan, then, the stem is need one which is most help support the implement.

so I view it as a evaluation PLAN.

I analyzed plan questions and found that it can be approached from 3 aspects to assess, viability/necessary , operation/process, effect/aim/goal.

next step, I need one that can state the advantage of the plan as 3 aspects above.

A) There is considerable variation in the color and patterns present in most people's irises
A states the character of the technology that can identify different individual.
I view A as a viability, -- credit one

C) In-person security services will not suffer from technological glitches when allowing access to laptops
C numerates an security -- in person security-- which eliminates people's panic,
C implies the tech provides an security that users can use it safely.
I vies C as an effect -- credit one

D) Colored contacts allow people to change their eye color, without altering any of the other characteristics of their iris.
yes, in real life, people will change eye color through lenses,
D implies the technology can tolerant the variation in life,
D states a advantage of the technology
so I view it as an effect -- credit one

based on the reasoning, 3 options are credit, I think I certainly missed something that leads me to a dilemma.
I desire an approach to break the dilemma.
call your help...

thanks a lot
have a nice weekends.

>_~

thanks a lot have a nice weekends. >_~

drscorpgal · Answer

A

Sent from my ASUS_Z00LD using  GMAT Club Forum mobile app

mikemcgarry · Answer

Dear zoezhuyan , I'm happy to respond. :-)

I hope you are well, my friend. :-)

You are probably familiar with Negation Test for CR Assumption arguments. Well, the Negation Test is more widely applicable. Think about it. Suppose I say that Statement X provides support for some argument: well if someone else comes along and points out that Statement X could be 100% false and the argument would still work, then the argument really didn't need the support it was getting from Statement X! Something is a not very important support if it can be false and the argument still can work! One way to approach (A), (C), and (D) in this question is to negate each. What if (A) is false? The " the color and patterns present in most people's irises " is mostly the same, and neither people nor computers can tell the difference. If this is true, the entire plan is a waste of money! There would be absolutely no sense in creating identity protection software based on people's irises if the irises of different people were indistinguishable. Negating this obliterates the argument. What is (C) is false? Suppose there are " technological glitches when allowing access to laptops ." Well, what else is new? What program or security service that we use now does not suffer from glitches? If the glitches were so severe that nobody could use the service, that would be a big problem, but if there were simply some glitches, typically of all the other programs we use, the company could still move forward and make a profit. If this statement were false, it may present some difficulties, but it would not destroy the argument. What if (D) is false? Suppose " colored contacts " radically alter the " characteristics of their iris ." Well, first of all, among all computer users, the percent of folks with colored contacts is probably small, so perhaps it would not impact the market that much. Also, suppose someone is wearing some kind of contact that completely alters the appearance of their iris: if that person wanted to use this service, all he would have to do is pop the contact out, have the computer scan his naked iris, and then put the contact back in. That would be a mild inconvenience, but it wouldn't prevent someone from using this security system. If this statement were false, it may present some difficulties, but it would not destroy the argument. By negating, we can more easily see what is essential. (C) & (D) are helpful, but not essential, whereas (A) is absolutely essential: if (A) is false, then the entire project is a no-go. Does all this make sense? I hope you are very well, my friend. Have a wonderful day. :-)

Mike McGarry :-)

zoezhuyan · Answer

thanks so much , Mike.

before reading this explanation, I have not realized Negation skill that can be used so widely.
I had a new interpretation about Negation...
this interpretation reminiscent "toucan beak", a CR weaken question from Magoosh, 
the last choice of toucan beak , similar holes in different trees, is eliminated by Negation skill.

back to this case, I figured out efficient approach definitely save time,. obviously, the Plan way is not efficient for this case, leaving 3 options and involving one more negation skill to eliminate. 
hoping I can grasp a "efficient approach" or pattern, which can make up the time consumption of reading question.

thanks Mike.

have a nice day.
>_~

aragonn · Answer

Official Explanation Magoosh: 
Answer = (A). The conclusion here belongs to the inventor: companies that use the new computer will run fewer security risks. Her evidence is that it uses iris scanners so that only authorized users can use it. To strengthen the connection between reduced security risks and only selected individuals accessing computers, we have to make the assumption that irises can be distinguished from one another with some degree of precision. (A) provides us with this answer in slightly different words.

Because the system is meant to allow only certain individuals to access the machines, changing irises (B) might actually present a problem for the system, if the system were incapable of accounting for this change. If this were the case, this choice would weaken, not strengthen, the company’s case for developing this prototype. It may be iris size makes no difference, in which case this choice is irrelevant, or it may make a difference, in which case this choice is a weakener. Either way, it's not a strengthener.

It's not clear how relevant choice (C) is. First of all, the company is not developing the laptop in tandem with in-person security services—or if it is, the passage does not mention it; thus, this choice may or may not be directly relevant. Furthermore, there's something eerily unrealistic about this option: what technology on Earth suffers from zero glitches?? Even if there is a small glitch rate, say under 1% of the time, that would be an annoyance, but not enough to impact overall sales and the success of the product. Thus, choice (C) does not have to be strictly true.

People might change their eye color, even users of these machines (D), but we aren’t told how this would affect their access to the machines, or how the machines would deal with this additional factor. Nevertheless, if anything, this would weaken the case for the company to develop these computers, so it’s not what we’re looking for.

We’re not concerned with what other companies do (E); this question is only asking us about this company, in particular. It’s possible that the development of this product would affect other companies, or the consumer’s use of other companies, but it’s not necessary to consider this to identify and strengthen the conclusion in this argument.

CR -- iris scanner

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