Scientists have discovered a new species of butterfly that : GMAT Critical Reasoning (CR)
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 20 Jan 2017, 21:47

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Scientists have discovered a new species of butterfly that

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:

### Hide Tags

Intern
Joined: 14 Jun 2011
Posts: 15
Location: India
Schools: NUS,Rotterdam
Followers: 0

Kudos [?]: 10 [0], given: 1

Scientists have discovered a new species of butterfly that [#permalink]

### Show Tags

16 Apr 2012, 08:34
1
This post was
BOOKMARKED
00:00

Difficulty:

5% (low)

Question Stats:

81% (01:44) correct 19% (01:01) wrong based on 237 sessions

### HideShow timer Statistics

Scientists have discovered a new species of butterfly that lives only in a small region of Central America and is
active only at night. During the day, it rests in treetops, where its green color matches the foliage perfectly.
Therefore, the scientists must have discovered the butterfly at night.

The argument depends on which of the following assumptions?

• The newly discovered butterfly is not related to any other species of butterfly.
• There is no way for the scientists to detect the butterfly during the day.
• No other butterfly species lives in this region of Central America.
• The foliage in the butterfly’s habitat is completely green.
• The butterfly cannot survive in areas outside of Central America.
[Reveal] Spoiler: OA

Last edited by mandald on 16 Apr 2012, 22:18, edited 1 time in total.
If you have any questions
you can ask an expert
New!
Manager
Joined: 12 Oct 2011
Posts: 131
GMAT 1: 700 Q48 V37
GMAT 2: 720 Q48 V40
Followers: 4

Kudos [?]: 192 [0], given: 23

Re: Assumtion Question [#permalink]

### Show Tags

16 Apr 2012, 09:02
I'd say B.

The assumption acts as a logical bridge between the premise and the conclusion. The conclusion is about the scientists not being able to detect them. So the correct answer must include some information about scientists in order to be true.

A) unnecessary information
B) If the butterfly hides during the day and the scientists are only able to find them at night, they must be unable to find them during the day
C) not important
D) not important
E) probably the reason why it only lives in that area, but not important for conclusion to be true.
Intern
Joined: 14 Jun 2011
Posts: 15
Location: India
Schools: NUS,Rotterdam
Followers: 0

Kudos [?]: 10 [0], given: 1

Re: Assumtion Question [#permalink]

### Show Tags

16 Apr 2012, 09:31
BN1989 wrote:
I'd say B.

The assumption acts as a logical bridge between the premise and the conclusion. The conclusion is about the scientists not being able to detect them. So the correct answer must include some information about scientists in order to be true.

A) unnecessary information
B) If the butterfly hides during the day and the scientists are only able to find them at night, they must be unable to find them during the day
C) not important
D) not important
E) probably the reason why it only lives in that area, but not important for conclusion to be true.

Hi,

Could you please xplain why D is "Not Important"..
Manager
Joined: 12 Oct 2011
Posts: 131
GMAT 1: 700 Q48 V37
GMAT 2: 720 Q48 V40
Followers: 4

Kudos [?]: 192 [0], given: 23

Re: Assumtion Question [#permalink]

### Show Tags

16 Apr 2012, 09:59
mandald wrote:
BN1989 wrote:
I'd say B.

The assumption acts as a logical bridge between the premise and the conclusion. The conclusion is about the scientists not being able to detect them. So the correct answer must include some information about scientists in order to be true.

A) unnecessary information
B) If the butterfly hides during the day and the scientists are only able to find them at night, they must be unable to find them during the day
C) not important
D) not important
E) probably the reason why it only lives in that area, but not important for conclusion to be true.

Hi,

Could you please xplain why D is "Not Important"..

Even if it might not be completely green, it would still match the foliage perfectly, so that the scientists would still be unable to find them there.
Manager
Joined: 30 Sep 2009
Posts: 124
Followers: 0

Kudos [?]: 27 [0], given: 183

Re: Assumtion Question [#permalink]

### Show Tags

22 May 2012, 05:28
Confused with B and D :
Try negating the assumption....
• There is no way for the scientists to detect the butterfly during the day.
There is some way for scientists to detect butterfly during the day . Therefore the scientists must have discovered the butterfly at night...

By negating the assumption the conclusion becomes untrue . Therefore B is correct...
• The foliage in the butterfly’s habitat is completely green.
Try negating the above sentence :
The foliage in the butterfly's habitat is not completely green.Therefore the scientists must have discovered the butterfly at night.......

The conclusion can still be true .... So D is incorrect...
Current Student
Joined: 21 May 2012
Posts: 92
Location: United States (CA)
Followers: 4

Kudos [?]: 32 [0], given: 0

Re: Assumtion Question [#permalink]

### Show Tags

22 May 2012, 06:38
mandald wrote:
Could you please xplain why D is "Not Important"..

During the day, it rests in treetops, where its green color matches the foliage perfectly.

D The foliage in the butterfly’s habitat is completely green.

I found answer D to be irrelevant because it is already stated that the butterfly matches the foliage perfectly. It doesn't matter what color the foliage is. It could be hot pink and it is established that it matches perfectly.
Retired Moderator
Status: 2000 posts! I don't know whether I should feel great or sad about it! LOL
Joined: 04 Oct 2009
Posts: 1712
Location: Peru
Schools: Harvard, Stanford, Wharton, MIT & HKS (Government)
WE 1: Economic research
WE 2: Banking
WE 3: Government: Foreign Trade and SMEs
Followers: 97

Kudos [?]: 914 [0], given: 109

Re: Assumtion Question [#permalink]

### Show Tags

22 May 2012, 08:05
+1 B

D is wrong because of the word "completly". What about if only a leaf is brown, the butterfly could be invisible even at that scenario.

Apply the negation technique and remember that each word can make a difference.
_________________

"Life’s battle doesn’t always go to stronger or faster men; but sooner or later the man who wins is the one who thinks he can."

My Integrated Reasoning Logbook / Diary: http://gmatclub.com/forum/my-ir-logbook-diary-133264.html

GMAT Club Premium Membership - big benefits and savings

Manager
Joined: 02 Jan 2011
Posts: 201
Followers: 1

Kudos [?]: 52 [0], given: 22

Re: Assumtion Question [#permalink]

### Show Tags

22 May 2012, 23:39
• The newly discovered butterfly is not related to any other species of butterfly. - Irrelevant information - Incorrect
• There is no way for the scientists to detect the butterfly during the day. - Only when there is no way of detecting the butterfly during the day, it can be detected at night. - Correct
• No other butterfly species lives in this region of Central America. - We are not talking about any other butterfly species - Incorrect
• The foliage in the butterfly’s habitat is completely green. - Already stated in the arguement - Incorrect• The butterfly cannot survive in areas outside of Central America. - Irrelevant - Incorrect
Senior Manager
Joined: 15 Sep 2009
Posts: 271
GMAT 1: 750 Q V
Followers: 10

Kudos [?]: 69 [0], given: 6

Re: Assumtion Question [#permalink]

### Show Tags

25 Jun 2012, 01:34

In forming its conclusion, the argument is making the bold assumption that the scientists do not have any way of catching the butterflies in the day time. If the scientists did, then clearly the argument that the butterflies were definitely caught at night is smash to a thousand and one pieces.

Cheers,
Der alte Fritz.
_________________

+1 Kudos me - I'm half Irish, half Prussian.

Manager
Joined: 28 Jul 2011
Posts: 240
Followers: 3

Kudos [?]: 119 [0], given: 16

Re: Assumtion Question [#permalink]

### Show Tags

25 Jun 2012, 15:47
B

Conclusion: the scientists must have discovered the butterfly at night

Premise: active only at night
Premise: During the day, its green color matches the foliage perfectly

• The newly discovered butterfly is not related to any other species of butterfly.
--> Out of scope we are not discussing about any other species

• There is no way for the scientists to detect the butterfly during the day.
--> Additional premise that will strengthen the conclusion [keep it]

• No other butterfly species lives in this region of Central America.
--> out of scope as same as A

• The foliage in the butterfly’s habitat is completely green.
--> Already a premise cannot use it "its green color matches the foliage perfectly"

• The butterfly cannot survive in areas outside of Central America.
--> out of scope
GMAT Club Legend
Joined: 01 Oct 2013
Posts: 10534
Followers: 919

Kudos [?]: 203 [0], given: 0

Re: Scientists have discovered a new species of butterfly that [#permalink]

### Show Tags

15 Aug 2014, 05:00
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Senior Manager
Joined: 02 Mar 2012
Posts: 374
Schools: Schulich '16
Followers: 4

Kudos [?]: 63 [0], given: 4

Scientists have discovered a new species of butterfly that [#permalink]

### Show Tags

15 Aug 2014, 12:55
Hi,

IMO B.

there are two types of assumptions:
supporter and defender

the answer choice will have tend to one these types.

here the answer choices are based on defender assumption i.e. it rules out any other possibilitiues for it to happen .

i guess it helps.

-H
Manager
Joined: 09 Sep 2013
Posts: 67
Followers: 0

Kudos [?]: 1 [0], given: 8

Re: Scientists have discovered a new species of butterfly that [#permalink]

### Show Tags

25 Jun 2016, 22:17
I will use the @empowergmat technique.
the argument says- Butterfly, green camouflague ->Disc only at night
What i want to know- Any way to disc in day.

• The newly discovered butterfly is not related to any other species of butterfly. Are we discussing the relation? NO remove
• There is no way for the scientists to detect the butterfly during the day.
• No other butterfly species lives in this region of Central America. Are we discussing where they live? No Remove
• The foliage in the butterfly’s habitat is completely green.
• The butterfly cannot survive in areas outside of Central America. Are we discussing where they can survive.

I had to think deep to remove d.
D says about foliage, it does not tell anything about when they can be discovered. In day or night. Therefore we do not know. @empowergmat is D is the best incorrect answer.

So we have B as the answer.

My document says 700. But i guess with time this has become a Sub 600 question
Senior Manager
Status: On a mountain of skulls, in the castle of pain, I sit on a throne of blood.
Joined: 30 Jul 2013
Posts: 366
Followers: 9

Kudos [?]: 160 [0], given: 133

Re: Scientists have discovered a new species of butterfly that [#permalink]

### Show Tags

27 Jun 2016, 23:05
lee2390 wrote:
I will use the @empowergmat technique.
the argument says- Butterfly, green camouflague ->Disc only at night
What i want to know- Any way to disc in day.

• The newly discovered butterfly is not related to any other species of butterfly. Are we discussing the relation? NO remove
• There is no way for the scientists to detect the butterfly during the day.
• No other butterfly species lives in this region of Central America. Are we discussing where they live? No Remove
• The foliage in the butterfly’s habitat is completely green.
• The butterfly cannot survive in areas outside of Central America. Are we discussing where they can survive.

I had to think deep to remove d.
D says about foliage, it does not tell anything about when they can be discovered. In day or night. Therefore we do not know. @empowergmat is D is the best incorrect answer.

So we have B as the answer.

My document says 700. But i guess with time this has become a Sub 600 question

We do not know how green the foliage is. It could be as green as the butterfly (thus making the butterfly undetectable) or it could also be more green or less green than the butterfly (thus making the butterfly detectable). Now it is already given explicitly in the stem that the tree on which the butterfly sits perfectly matches the butterfly - so this cannot be the assumption. More importantly, the fact that the butterfly's foliage matches the tree is more tangible to us than the butterfly being green (because as mentioned earlier we don't know if the butterfly can be camouflaged based on the previously mentioned logic).
Re: Scientists have discovered a new species of butterfly that   [#permalink] 27 Jun 2016, 23:05
Similar topics Replies Last post
Similar
Topics:
1 Scientist have discovered a specific region in the brain that 1 26 Mar 2016, 08:35
Scientists believe they have discovered 1 04 Jun 2015, 02:50
3 Scientists have not yet concluded whether a newly discovered 9 20 Oct 2010, 18:40
2 A new species of fish has just been discovered living in 22 30 May 2010, 09:03
Scientists have discovered a new species of butterfly that 15 31 Oct 2007, 10:08
Display posts from previous: Sort by

# Scientists have discovered a new species of butterfly that

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group and phpBB SEO Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.