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I bought a pair of glasses from an optometrist. One of the lenses regu

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I bought a pair of glasses from an optometrist. One of the lenses regu  [#permalink]

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New post 15 Feb 2019, 04:13
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94% (00:52) correct 6% (01:23) wrong based on 69 sessions

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I bought a pair of glasses from an optometrist. One of the lenses regularly pops out of the frame. Therefore, this optometrist doesn’t know how to make a good pair of glasses.

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

(A) does not allow the optometrist a chance to defend himself

(B) does not consider the possibility that other optometrists also make defective frames

(C) criticizes the optometrist’s use of a particular technique when making glasses

(D) jumps to the conclusion that the defect in the glasses must be due to the optometrist’s lack of skill

(E) accuses the optometrist of deliberately sabotaging the glasses

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Re: I bought a pair of glasses from an optometrist. One of the lenses regu  [#permalink]

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New post 17 Feb 2019, 11:01
D correctly weakens the statement.
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Re: I bought a pair of glasses from an optometrist. One of the lenses regu  [#permalink]

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New post 18 Feb 2019, 01:29
Bunuel wrote:
I bought a pair of glasses from an optometrist. One of the lenses regularly pops out of the frame. Therefore, this optometrist doesn’t know how to make a good pair of glasses.

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

(A) does not allow the optometrist a chance to defend himself

(B) does not consider the possibility that other optometrists also make defective frames

(C) criticizes the optometrist’s use of a particular technique when making glasses

(D) jumps to the conclusion that the defect in the glasses must be due to the optometrist’s lack of skill

(E) accuses the optometrist of deliberately sabotaging the glasses


From the question stem we need to focus on the weakness in the argument:

(A) does not allow the optometrist a chance to defend himself
Not relevant

(B) does not consider the possibility that other optometrists also make defective frames
Not relevant

(C) criticizes the optometrist’s use of a particular technique when making glasses
No technique has been referred to in the argument. Hence not relevant

(D) jumps to the conclusion that the defect in the glasses must be due to the optometrist’s lack of skill
Correct. No other reasons have been analysed in the argument and weakens the argument.

(E) accuses the optometrist of deliberately sabotaging the glasses
Not such accusations made. Not relevant
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Re: I bought a pair of glasses from an optometrist. One of the lenses regu  [#permalink]

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New post 27 Feb 2019, 04:26
Bunuel wrote:
I bought a pair of glasses from an optometrist. One of the lenses regularly pops out of the frame. Therefore, this optometrist doesn’t know how to make a good pair of glasses.

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

(A) does not allow the optometrist a chance to defend himself

(B) does not consider the possibility that other optometrists also make defective frames

(C) criticizes the optometrist’s use of a particular technique when making glasses

(D) jumps to the conclusion that the defect in the glasses must be due to the optometrist’s lack of skill

(E) accuses the optometrist of deliberately sabotaging the glasses


OFFICIAL EXPLANATION:



D. jumps to the conclusion that the defect in the glasses must be due to the optometrist’s lack of skill

The conclusion is that the optometrist is incompetent; the evidence is that one lens pops out regularly. But there’s no evidence that that’s because of the optometrist’s lack of skill. Choice (A) is wrong. Although giving the optometrist a chance to defend himself would be nice, it’s not a fault of the argument that the speaker doesn’t provide one. Choice (B) is wrong because other potentially unskilled optometrists have no bearing on the skills of the one in question here. Choice (C) doesn’t work. The author doesn’t mention any particular techniques. Choice (D) may be the answer. The author does jump to a conclusion here without making a connection between the glasses and the optometrist’s skill. Choice (E) is wrong because the author doesn’t suggest that sabotage played a role in the bad glasses. Choice (D) is the best answer.
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New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


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Re: I bought a pair of glasses from an optometrist. One of the lenses regu   [#permalink] 27 Feb 2019, 04:26
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