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sam2304 GMAT Titan
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Eye disorder Post Sun Apr 15, 2012 12:35 am
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  • Lap #[LAPCOUNT] ([LAPTIME])
    People with a certain eye disorder are virtually unable to see in moderately bright light, which seems to them unbearably intense, since the cells of their retinas are overwhelmed by moderately bright light. These people do, however, show normal sensitivity to most components of dim light. Their retinal cells are also not excessively sensitive to red components of moderately bright light.

    The information above best supports which of the following hypotheses about people with the disorder described, if they have no other serious visual problems?

    A. In all moderately dim light in which people without the disorder can read large print, people with the disorder cannot read such print.
    B. In an otherwise darkened concert hall, these people will see a dimly illuminated red exit sign more clearly than small dim white lights that mark the aisles.
    C. These people typically see more acutely at night and in dim light than do most people who do not have the disorder.
    D. Eyeglasses that are transparent to red components of light but filter out other components of light help these people see in moderately bright light.
    E. These people perceive colors other than red in the same way as do most people who do not have the disorder.

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    Birottam Dutta GMAT Destroyer!
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    Post Sun Apr 15, 2012 2:34 am
    To support the information provided in the passage, the hypotheses needs to be consistent with the information:

    Choice A talks about size of prints which is not a factor in the passage.
    Choice B says that in dimly illuminated hall, these people will see a red exit better than white lights but as per the passage, the vision of these people in dim light is normal with o disorders.
    Choice C talks of better vision at night and dim light which is again not supported by the passage.
    Choice D says that eye glasses filter out other components of bright light and allow red light to help these people see better in moderately bright light. This is very much supported by the passage and is a valid hypotheses.
    Choice E is not talked about in this passage.

    Hence, D!

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    GmatKiss GMAT Titan Default Avatar
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    Post Sun Apr 15, 2012 5:09 am
    IMO: D for talking about red components and moderately bright light

    dipzzz Just gettin' started! Default Avatar
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    Post Mon Apr 16, 2012 2:15 am
    IMO D

    The eyes of people with the disorder are highly sensitive to moderately bright light but not to the red component .

    Therefore, they can conveniently use eyeglasses that are transparent to red components of light but filter out other components of moderately bright light.

    amit.trivedi@ymail.com GMAT Destroyer!
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    Post Mon Apr 16, 2012 9:22 am
    Though sucking zinc lozenges has been promoted as a treatment for the common cold, research has revealed no consistent effect. Recently, however, a zinc gel applied nasally has been shown to greatly reduce the duration of colds. Since the gel contains zinc in the same form and concentration as the lozenges, the greater effectiveness of the gel must be due to the fact that cold viruses tend to concentrate in the nose, not the mouth.


    Which of the following, if true, most seriously weakens the argument ?

    A Experimental subjects who used the zinc gel not only had colds of shorter duration but also had less severe symtoms than did those who used a gel that did not contain zinc.

    B The mechanism by which zinc affects the viruses that cause the common cold has not been conclusively established.

    C To make them palatable, zinc lozenges generally contain other ingredients, such as citric acid, that can interfere with the chemical activity of zinc.

    D No zinc-based cold remedy can have any effect unless it is taken or applied within 48 hours of the initial onset of cold symptoms.

    E Drug-company researchers experimenting with a nasal spray based on zinc have found that it has much the same effect on colds as the gel does.

    This is an inference question and you should look out for options that tell only what is given in the stimulus and not anything extra or anything assumed...

    Option D is the only option that says absolutely in a concise manner and without any flaws.

    I do not think any explanation needs to be given for all the other options...

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    amit.trivedi@ymail.com GMAT Destroyer!
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    Post Mon Apr 16, 2012 9:26 am
    By the way what is the OA sam 2304??? inference questions only ask things explicitly in the stimulus.

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    oldsole00 Just gettin' started! Default Avatar
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    Post Mon Apr 16, 2012 10:16 am
    Can you please explain why you have given two different answers to this same question on two different forums? Confusing at best.

    Explanation 1
    amit.trivedi@ymail.com wrote:
    Though sucking zinc lozenges has been promoted as a treatment for the common cold, research has revealed no consistent effect. Recently, however, a zinc gel applied nasally has been shown to greatly reduce the duration of colds. Since the gel contains zinc in the same form and concentration as the lozenges, the greater effectiveness of the gel must be due to the fact that cold viruses tend to concentrate in the nose, not the mouth.


    Which of the following, if true, most seriously weakens the argument ?

    A Experimental subjects who used the zinc gel not only had colds of shorter duration but also had less severe symtoms than did those who used a gel that did not contain zinc.

    B The mechanism by which zinc affects the viruses that cause the common cold has not been conclusively established.

    C To make them palatable, zinc lozenges generally contain other ingredients, such as citric acid, that can interfere with the chemical activity of zinc.

    D No zinc-based cold remedy can have any effect unless it is taken or applied within 48 hours of the initial onset of cold symptoms.

    E Drug-company researchers experimenting with a nasal spray based on zinc have found that it has much the same effect on colds as the gel does.

    This is an inference question and you should look out for options that tell only what is given in the stimulus and not anything extra or anything assumed...

    Option D is the only option that says absolutely in a concise manner and without any flaws.

    I do not think any explanation needs to be given for all the other options...
    Explanation 2 (from another forum)

    amit.trivedi@ymail.com wrote:
    Which of the following, if true, most seriously weakens the argument ?

    A Experimental subjects who used the zinc gel not only had colds of shorter duration but also had less severe symtoms than did those who used a gel that did not contain zinc.

    B The mechanism by which zinc affects the viruses that cause the common cold has not been conclusively established.

    C To make them palatable, zinc lozenges generally contain other ingredients, such as citric acid, that can interfere with the chemical activity of zinc.

    D No zinc-based cold remedy can have any effect unless it is taken or applied within 48 hours of the initial onset of cold symptoms.

    E Drug-company researchers experimenting with a nasal spray based on zinc have found that it has much the same effect on colds as the gel does.

    This is a causal reasoning with comparison question. Normal zinc lozenges do not affect or help to cure common cold but when applied the gel having zinc, then it helps cure common cold. Hence the stimulus says that the reason for the cure of common cold is the gel that is applied at the nose and hence maximum germs are present in the nose and not in the mouth.

    So if you want to weaken this question see the options:

    Option A: Comparison between cold for longer duration and shorter duration. Out of scope not valid.

    Option B: We are not concerned with the mechanism. Even if we are concerned with the mechanism it does not differentiate between zinc lozenges and zinc gel. Hence not affecting the argument and hence Out of scope

    Option D: Again talking overall of all the zinc based products or medicine. Not talking or differentiating about between zinc gel or zinc lozenges.

    Option E: Again out of scope as we are not talking about nasal spray based on zinc...


    Option C is the perfect negation to the argument or the causal argument.

    I would go for the option C and am sure that the OA is C.
    Straight-up contradicting yourself. Explanation, or just careless?

    sam2304 GMAT Titan
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    Post Mon Apr 16, 2012 11:05 am
    amit.trivedi@ymail.com wrote:
    By the way what is the OA sam 2304??? inference questions only ask things explicitly in the stimulus.
    @amit: I am still in the learning process of answering inference questions, but would you mind reading the question properly and answer it. Please check above post of yours if that is the question which I asked for explanation.

    OA : C - to the question posted by me.

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