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# All intelligent people are nearsighted

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Intern
Joined: 29 Dec 2016
Posts: 21
Concentration: Finance, Entrepreneurship
GMAT 1: 550 Q47 V20
GPA: 3.2
All intelligent people are nearsighted  [#permalink]

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Updated on: 09 Jun 2017, 01:20
5
00:00

Difficulty:

95% (hard)

Question Stats:

45% (01:48) correct 55% (01:33) wrong based on 208 sessions

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All intelligent people are nearsighted. I am very nearsighted. So I must be a genius.

Which one of the following exhibits both of the logical flaws exhibited in the argument above?

(A) I must be stupid because all intelligent people are nearsighted and I have perfect eyesight.

(B) All chickens have beaks. This bird has a beak. So this bird must be a chicken.

(C) All pigs have four legs, but this spider has eight legs. So this spider must be twice as big as any pig.

(D) John is extremely happy, so he must be extremely tall because all tall people are happy.

(E) All geniuses are very nearsighted. I must be very nearsighted since I am a genius.

Originally posted by Nahid078 on 13 Feb 2017, 05:08.
Last edited by broall on 09 Jun 2017, 01:20, edited 1 time in total.
Reformatted question
Director
Joined: 14 Nov 2014
Posts: 634
Location: India
GMAT 1: 700 Q50 V34
GPA: 3.76
Re: All intelligent people are nearsighted  [#permalink]

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13 Feb 2017, 07:12
Nahid078 wrote:
All intelligent people are nearsighted. I am very
nearsighted. So I must be a genius.
Which one of the following exhibits both of the
logical flaws exhibited in the argument above?
(A) I must be stupid because all intelligent people
are nearsighted and I have perfect eyesight.
(B) All chickens have beaks. This bird has a beak.
So this bird must be a chicken.
(C) All pigs have four legs, but this spider has eight
legs. So this spider must be twice as big as any
pig.
(D) John is extremely happy, so he must be
extremely tall because all tall people are happy.
(E) All geniuses are very nearsighted. I must be
very nearsighted since I am a genius.

In my opinion , it is B ...why D is preferred over B...
Director
Affiliations: CrackVerbal
Joined: 03 Oct 2013
Posts: 533
Location: India
GMAT 1: 780 Q51 V46
Re: All intelligent people are nearsighted  [#permalink]

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13 Feb 2017, 20:46
Top Contributor
sobby wrote:
Nahid078 wrote:
All intelligent people are nearsighted. I am very
nearsighted. So I must be a genius.
Which one of the following exhibits both of the
logical flaws exhibited in the argument above?
(A) I must be stupid because all intelligent people
are nearsighted and I have perfect eyesight.
(B) All chickens have beaks. This bird has a beak.
So this bird must be a chicken.
(C) All pigs have four legs, but this spider has eight
legs. So this spider must be twice as big as any
pig.
(D) John is extremely happy, so he must be
extremely tall because all tall people are happy.
(E) All geniuses are very nearsighted. I must be
very nearsighted since I am a genius.

In my opinion , it is B ...why D is preferred over B...

You have to read the argument carefully.

let us break it down.
Premise 1: intelligent --> nearsighted.
Premise 2: very nearsighted
Conclusion: genius (very intelligent).

let us look at option D -
Premise 1: tall people --> happy.
Premise 2: extremely happy
Conclusion: extremely tall.

Note the modifiers "very" and "extremely".

B does not add these modifiers in premise 2 and the conclusion. hence, incorrect.
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Joined: 14 Dec 2013
Posts: 2951
Location: Germany
Schools: German MBA
GMAT 1: 780 Q50 V47
WE: Corporate Finance (Pharmaceuticals and Biotech)
Re: All intelligent people are nearsighted  [#permalink]

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15 Feb 2017, 06:09
sobby wrote:
Nahid078 wrote:
All intelligent people are nearsighted. I am very
nearsighted. So I must be a genius.
Which one of the following exhibits both of the
logical flaws exhibited in the argument above?
(A) I must be stupid because all intelligent people
are nearsighted and I have perfect eyesight.
(B) All chickens have beaks. This bird has a beak.
So this bird must be a chicken.
(C) All pigs have four legs, but this spider has eight
legs. So this spider must be twice as big as any
pig.
(D) John is extremely happy, so he must be
extremely tall because all tall people are happy.
(E) All geniuses are very nearsighted. I must be
very nearsighted since I am a genius.

In my opinion , it is B ...why D is preferred over B...

The above post clarifies your query. In case you have further queries, please click again on the "request expert reply" button, mentioning your query - closing this request.
Retired Moderator
Status: The best is yet to come.....
Joined: 10 Mar 2013
Posts: 499
Re: All intelligent people are nearsighted  [#permalink]

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24 Jul 2017, 02:15
So, it is D.
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Hasan Mahmud

Director
Joined: 23 Jan 2013
Posts: 568
Schools: Cambridge'16
Re: All intelligent people are nearsighted  [#permalink]

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24 Jul 2017, 03:00
A causes B , so if B then A

Flaw: B has the only one cause

not any option fits the prephrased flaw ideally, only D assumes the same flaw
Senior Manager
Joined: 02 Apr 2014
Posts: 473
GMAT 1: 700 Q50 V34
All intelligent people are nearsighted  [#permalink]

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12 Nov 2017, 03:32
I missed the word "very" before near sighted and ended up choosing B. Classic trap set for reading in hurry.
All intelligent people are nearsighted &nbs [#permalink] 12 Nov 2017, 03:32
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