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Cyclists in the Tour de France are extremely physically fit: all of the winners of this race have had abnormal physiological constitutions. Typical of the abnormal physiology of these athletes are exceptional lung capacity and exceptionally powerful hearts. Tests conducted on last year’s winner did not reveal an exceptionally powerful heart. That cyclist must, therefore, have exceptional lung capacity.

Argument reasoning: Test conducted on last years winners did not reveal exceptionally powerful heart.

The reasoning in the argument is most vulnerable to criticism on the grounds that it overlooks the possibility that

(A) having exceptional lung capacity and an exceptionally powerful heart is an advantage in cycling
Wrong. This is what the argument is saying. We need to weaken it.

(B) some winners of the Tour de France have neither exceptional lung capacity nor exceptionally powerful hearts
Correct. This weakens the reasoning of the argument.

(C) cyclists with normal lung capacity rarely have exceptionally powerful hearts
Wrong. The argument states to have one of the both.

(D) the exceptional lung capacity and exceptionally powerful hearts of Tour de France winners are due to training
Wrong. They are not asking why.

(E) the notions of exceptional lung capacity and exceptional heart function are relative to the physiology of most cyclists
Wrong. This is just re-stating the argument.
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nandeta
Cyclists in the Tour de France are extremely physically fit: all of the winners of this race have had abnormal physiological constitutions. Typical of the abnormal physiology of these athletes are exceptional lung capacity and exceptionally powerful hearts. Tests conducted on last year’s winner did not reveal an exceptionally powerful heart. That cyclist must, therefore, have exceptional lung capacity.

Argument reasoning: Test conducted on last years winners did not reveal exceptionally powerful heart.

The reasoning in the argument is most vulnerable to criticism on the grounds that it overlooks the possibility that

(A) having exceptional lung capacity and an exceptionally powerful heart is an advantage in cycling
Wrong. This is what the argument is saying. We need to weaken it.

(B) some winners of the Tour de France have neither exceptional lung capacity nor exceptionally powerful hearts
Correct. This weakens the reasoning of the argument.

(C) cyclists with normal lung capacity rarely have exceptionally powerful hearts
Wrong. The argument states to have one of the both.

(D) the exceptional lung capacity and exceptionally powerful hearts of Tour de France winners are due to training
Wrong. They are not asking why.

(E) the notions of exceptional lung capacity and exceptional heart function are relative to the physiology of most cyclists
Wrong. This is just re-stating the argument.

I still do not understand how choice B weakens the argument
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Cyclists in the Tour de France are extremely physically fit: all of the winners of this race have had abnormal physiological constitutions. Typical of the abnormal physiology of these athletes are exceptional lung capacity and exceptionally powerful hearts. Tests conducted on last year’s winner did not reveal an exceptionally powerful heart. That cyclist must, therefore, have exceptional lung capacity.

Argument reasoning: Test conducted on last years winners did not reveal exceptionally powerful heart.

The reasoning in the argument is most vulnerable to criticism on the grounds that it overlooks the possibility that

(A) having exceptional lung capacity and an exceptionally powerful heart is an advantage in cycling
Wrong. This is what the argument is saying. We need to weaken it.

(B) some winners of the Tour de France have neither exceptional lung capacity nor exceptionally powerful hearts
Correct. This weakens the reasoning of the argument.

(C) cyclists with normal lung capacity rarely have exceptionally powerful hearts
Wrong. The argument states to have one of the both.

(D) the exceptional lung capacity and exceptionally powerful hearts of Tour de France winners are due to training
Wrong. They are not asking why.

(E) the notions of exceptional lung capacity and exceptional heart function are relative to the physiology of most cyclists
Wrong. This is just re-stating the argument.

I still do not understand how choice B weakens the argument

Notice the second sentence in the argument, "TYPICAL of the abnormal physiology of these athletes ARE exceptional lung capacity and exceptionally powerful hearts", which does NOT mean that ALL these winners have exceptional lung capacity and exceptionally powerful hearts. Hence, the reasoning overlooks the possibility that some winners do not have these 2 traits: although they have abnormal physiology, it may not involve exceptional lung capacity and exceptionally powerful hearts TYPICAL of the physiology of winners. (B) is correct.
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Cyclists in the Tour de France are extremely physically fit: all of the winners of this race have had abnormal physiological constitutions. Typical of the abnormal physiology of these athletes are exceptional lung capacity and exceptionally powerful hearts. Tests conducted on last year’s winner did not reveal an exceptionally powerful heart. That cyclist must, therefore, have exceptional lung capacity.

The reasoning in the argument is most vulnerable to criticism on the grounds that it overlooks the possibility that

(A) having exceptional lung capacity and an exceptionally powerful heart is an advantage in cycling
Not relevant to whether the cyclist in question has exceptional lung capacity

(B) some winners of the Tour de France have neither exceptional lung capacity nor exceptionally powerful hearts
The question specifies that all the winners have exceptional constitutions, not lung and heart capacities. Bingo.


(C) cyclists with normal lung capacity rarely have exceptionally powerful hearts
Doesn't seem relevant. At least when it comes to competitive cyclists it is TYPICAL

(D) the exceptional lung capacity and exceptionally powerful hearts of Tour de France winners are due to training

If anything this would strengthen the conclusion.

(E) the notions of exceptional lung capacity and exceptional heart function are relative to the physiology of most cyclists
Great. But they are still exceptional, right? In any event, does this impact the conclusion in either direction?
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Cyclists in the Tour de France are extremely physically fit: all of the winners of this race have had abnormal physiological constitutions. Typical of the abnormal physiology of these athletes are exceptional lung capacity and exceptionally powerful hearts. Tests conducted on last year’s winner did not reveal an exceptionally powerful heart. That cyclist must, therefore, have exceptional lung capacity.

The reasoning in the argument is most vulnerable to criticism on the grounds that it overlooks the possibility that

(A) having exceptional lung capacity and an exceptionally powerful heart is an advantage in cycling
(B) some winners of the Tour de France have neither exceptional lung capacity nor exceptionally powerful hearts
(C) cyclists with normal lung capacity rarely have exceptionally powerful hearts
(D) the exceptional lung capacity and exceptionally powerful hearts of Tour de France winners are due to training
(E) the notions of exceptional lung capacity and exceptional heart function are relative to the physiology of most cyclists

The last sentence of the passage is the conclusion and we need to find something that weakens it. So, it should either say something else other than lung capacity helped last year's winner win the race or that both exceptional powerful heart and exceptional lung capacity is not a necessity.
The word 'that' in the last sentence is specific to the cyclist. B makes a generic statement about cyclists that must include last year's winner. However, this generic statement does create a doubt selecting it.

On the other hand, E goes in either direction - strengthens or weakens - depending on the further assumption one makes.
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Cyclists in the Tour de France are extremely physically fit: all of the winners of this race have had abnormal physiological constitutions. Typical of the abnormal physiology of these athletes are exceptional lung capacity and exceptionally powerful hearts. Tests conducted on last year’s winner did not reveal an exceptionally powerful heart. That cyclist must, therefore, have exceptional lung capacity.

The reasoning in the argument is most vulnerable to criticism on the grounds that it overlooks the possibility that

(A) having exceptional lung capacity and an exceptionally powerful heart is an advantage in cycling
(B) some winners of the Tour de France have neither exceptional lung capacity nor exceptionally powerful hearts
(C) cyclists with normal lung capacity rarely have exceptionally powerful hearts
(D) the exceptional lung capacity and exceptionally powerful hearts of Tour de France winners are due to training
(E) the notions of exceptional lung capacity and exceptional heart function are relative to the physiology of most cyclists

Here, we need to understand the below 2 premises clearly to solve this question/
1)All of the winners of this race have had abnormal physiological constitutions
2)Typical of the abnormal physiology of these athletes are exceptional lung capacity and exceptionally powerful hearts

Derived statement

This means All the winners must have Abnormal Physiology, and Most of the winners have the exceptional lung capacity and exceptionally powerful hearts


So now its clear that there are some winners who don't have both exceptional lung capacity and exceptionally powerful.
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