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QOTD: A researcher discovered that people who have low levels

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QOTD: A researcher discovered that people who have low levels [#permalink]

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New post 27 Dec 2017, 15:58
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

64% (00:57) correct 36% (01:00) wrong based on 204 sessions

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Verbal Question of The Day: Day 188: Critical Reasoning


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A researcher discovered that people who have low levels of immune-system activity tend to score much lower on tests of mental health than do people with normal or high immune-system activity. The researcher concluded from this experiment that the immune system protects against mental illness as well as against physical disease.

The researcher’s conclusion depends on which of the following assumptions?

A. High immune-system activity protects against mental illness better than normal immune-system activity does.

B. Mental illness is similar to physical disease in its effects on body systems.

C. People with high immune-system activity cannot develop mental illness.

D. Mental illness does not cause people’s immune-system activity to decrease.

E. Psychological treatment of mental illness is not as effective as is medical treatment.



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Re: QOTD: A researcher discovered that people who have low levels [#permalink]

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New post 27 Dec 2017, 16:20
Went with D

low levels of immune-system-- lower on tests of mental health than do people with normal or high immune-system activity.
Conclusion -- the immune system protects against mental illness as well as against physical disease.

So, the author have to take into consideration option D before he makes this a conclusion.

D. Mental illness does not cause people’s immune-system activity to decrease

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Re: QOTD: A researcher discovered that people who have low levels [#permalink]

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New post 27 Dec 2017, 20:23
D It is.

This is a defender removing the existence of weakeners.

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New post 27 Dec 2017, 21:19
A researcher discovered that people who have low levels of immune-system activity tend to score much lower on tests of mental health than do people with normal or high immune-system activity. The researcher concluded from this experiment that the immune system protects against mental illness as well as against physical disease.

The researcher’s conclusion depends on which of the following assumptions?
Premise:
Cause: good immune system Effect: good Mental illness
Assumption:
The effect is not the cause [Reverse is not true]

D. Mental illness does not cause people’s immune-system activity to decrease.
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Kudos [?]: 119 [0], given: 502

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Re: QOTD: A researcher discovered that people who have low levels [#permalink]

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New post 27 Dec 2017, 22:34
DPANJA wrote:
Why not B?

Sent from my SM-J210F using GMAT Club Forum mobile app

Premise mentions physical diseases only in last sentence : " The researcher concluded from this experiment that the immune system protects against as well as against physical disease."
= Immune systems protects against physical diseases
= Immune systems protects against mental illness

B: X is similar to Y in its effects on body systems.
Does the premise mention how physical diseases affect immune system or can you infer this from the premise?
I don't think so. Then how can you say X is similar to Y in the way Y affects the body systems(e.g immune system), when the premise does NOT address how Y affects the body systems at the first place?
In B, X is referring to Y in its behavior, whereas Y's behavior itself is not discussed at all.

Hope you got the bottom line.
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Hit Kudus if this has helped you get closer to your goal, and also to assist others save time. Tq :)

Kudos [?]: 119 [0], given: 502

Re: QOTD: A researcher discovered that people who have low levels   [#permalink] 27 Dec 2017, 22:34
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