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27 Sep 2019, 03:39
Kudos
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
67% (02:01) correct
33%
(02:10)
wrong
based on 526
sessions
History
Date
Time
Result
Not Attempted Yet
Chronic fatigue syndrome, a condition that afflicts thousands of people, is invariably associated with lower-than-normal concentrations of magnesium in the blood. Further, malabsorption of magnesium from the digestive tract to the blood is also often associated with some types of fatigue. These facts in themselves demonstrate that treatments that raise the concentration of magnesium in the blood would provide an effective cure for the fatigue involved in the syndrome.
The argument is most vulnerable to which one of the following criticisms?
(A) It fails to establish that lower-than-normal concentrations of magnesium in the blood are invariably due to malabsorption of magnesium.
(B) It offers no evidence that fatigue itself does not induce lowered concentrations of magnesium in the blood.
(C) It ignores the possibility that even in people who are not afflicted with chronic fatigue syndrome, concentration of magnesium in the blood fluctuates.
(D) It neglects to state the exact concentration of magnesium in the blood which is considered the normal concentration.
(E) It does not specify what methods would be most effective in raising the concentration of magnesium in the blood.
The argument is most vulnerable to which one of the following criticisms?
(A) It fails to establish that lower-than-normal concentrations of magnesium in the blood are invariably due to malabsorption of magnesium.
(B) It offers no evidence that fatigue itself does not induce lowered concentrations of magnesium in the blood.
(C) It ignores the possibility that even in people who are not afflicted with chronic fatigue syndrome, concentration of magnesium in the blood fluctuates.
(D) It neglects to state the exact concentration of magnesium in the blood which is considered the normal concentration.
(E) It does not specify what methods would be most effective in raising the concentration of magnesium in the blood.
27 Sep 2019, 04:01
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Bunuel
CFS is associated with magnesium levels in blood. Author concludes that raise magnesium to cure CFS assuming that low levels of magnesium causes CFS. What if CFS causes low levels of magnesium. That would weaken the author's argument.
This is what is stated in B. Hence IMO B is the answer.
16 May 2025, 08:18
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