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After observing the Earth s weather patterns and the 11-year

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After observing the Earth s weather patterns and the 11-year [#permalink]

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16. After observing the Earth’s weather patterns and the 11-year sunspot cycle of the Sun for 36 years, scientists have found that high levels of sunspot activity precede shifts in wind patterns that affect the Earth’s weather. One can conclude that meteorologists will be able to improve their weather forecasts based on this information.

Which of the following, if true, most seriously weakens the argument above?

(A) Weather forecasts are more detailed today than they were 36 years ago.
(B) Scientists can establish that sunspot activity directly affects the Earth’s weather.
(C) Evidence other than sunspot activity has previously enabled meteorologists to forecast the weather conditions that are predictable on the basis of sunspot activity.
(D) Scientists have not determined why the sunspot activity on the Sun follows an 11-year cycle.
(E) It has been established that predictable wind patterns yield predictable weather patterns.
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Re: CR-sunspot cycle [#permalink]

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New post 25 Mar 2009, 04:04
IMO C

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New post 25 Mar 2009, 06:31
This is again an instance of
cause1 ---> effect1,
to weaken find some other cause2 which also causes effect1.

In this question,
Information from sunspot activity ---> will help to determine weather forecasts
But B says that
Evidence other than sunspot activity ---- > has also enabled meteorologists to forecast the weather conditions.

Edit: Hence C
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Last edited by jainu on 26 Mar 2009, 09:35, edited 1 time in total.

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Re: CR-sunspot cycle [#permalink]

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New post 25 Mar 2009, 07:31
C for me

Conclusion is that meteorologists will be able to improve their weather forecasts based on this information.

We need to prove that meteorologists will NOT be able to improve their weather forecasts based on this information.

C exactly does that. What ever can be deduced using the Sun spot activity has been deduced from other activity. Hence S will NOT be able to improve.

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New post 25 Mar 2009, 08:56
Yes C but why not A?
is it OOS?
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Re: CR-sunspot cycle [#permalink]

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New post 25 Mar 2009, 15:39
nitya34 wrote:
Yes C but why not A?
is it OOS?


Yes, it is unrelated and will NOT weaken the Conclusion

The key in conclusion is will be able to improve and pick answer that will make you say will NOT be able to improve

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New post 26 Mar 2009, 09:33
I am sorry I meant C above in my reply..it was a typo.
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Re: CR-sunspot cycle [#permalink]

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New post 26 Mar 2009, 10:04
16. After observing the Earth’s weather patterns and the 11-year sunspot cycle of the Sun for 36 years, scientists have found that high levels of sunspot activity precede shifts in wind patterns that affect the Earth’s weather. One can conclude that meteorologists will be able to improve their weather forecasts based on this information.

Which of the following, if true, most seriously weakens the argument above?

(A) Weather forecasts are more detailed today than they were 36 years ago.
(B) Scientists can establish that sunspot activity directly affects the Earth’s weather.
(C) Evidence other than sunspot activity has previously enabled meteorologists to forecast the weather conditions that are predictable on the basis of sunspot activity.
(D) Scientists have not determined why the sunspot activity on the Sun follows an 11-year cycle.
(E) It has been established that predictable wind patterns yield predictable weather patterns.

It is indeed C.

Evidence of other than sunspot activities already enabled us to predict weather condition..

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Re: CR-sunspot cycle [#permalink]

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New post 27 Oct 2009, 18:24
nitya34 wrote:
Yes C but why not A?
is it OOS?

A is only the general information, it does nothing about the conclusion which says due to the sunspot activity observation meteorologists will be able to improve their weather forecasts.
OA must be C

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After observing the Earth s weather patterns and the 11-year [#permalink]

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After observing the Earth’s weather patterns and the 11-year sunspot cycle of the Sun for 36 years, scientists have found that high levels of sunspot activity precede shifts in wind patterns that affect the Earth’s weather. One can conclude that meteorologists will be able to improve their weather forecasts based on this information.
Which of the following, if true, most seriously weakens the argument above?
(A) Weather forecasts are more detailed today than they were 36 years ago.
(B) Scientists can establish that sunspot activity directly affects the Earth’s weather.
(C) Evidence other than sunspot activity has previously enabled meteorologists to forecast the weather conditions that are predictable on the basis of sunspot activity.
(D) Scientists have not determined why the sunspot activity on the Sun follows an 11-year cycle.
(E) It has been established that predictable wind patterns yield predictable weather patterns.

Please give ur logic. Dont just say answer.
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Re: After observing the Earth’s weather patterns [#permalink]

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New post 27 Jan 2010, 16:59
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My pic is C
If other evidence can be used to predict the whether then there is no need of sunspot activity.
sunspot activity can still be used to double check however there is no improvement in forecasts
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Re: After observing the Earth’s weather patterns [#permalink]

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CN: meteorologists will be able to improve their weather forecasts based on this information.
Which of the following, if true, most seriously weakens the argument above?

(C) Evidence other than sunspot activity has previously enabled meteorologists to forecast the weather conditions that are predictable on the basis of sunspot activity.

-- This option says meteorologists already know this relationship from other source of information. So forecast will not improve.
This is the correct answer.
This question baffled me initially. Thanks for taking interest in this post guys.
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Re: After observing the Earth’s weather patterns [#permalink]

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New post 27 Jan 2010, 19:00
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I also go for C. Lets follow POE approach
A , D--> Irrelevant
C --> Keep it
B --> at most it strengthen the argument
E--> No way related

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Re: After observing the Earth’s weather patterns [#permalink]

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SudiptoGmat wrote:
CN: meteorologists will be able to improve their weather forecasts based on this information.
Which of the following, if true, most seriously weakens the argument above?

(C) Evidence other than sunspot activity has previously enabled meteorologists to forecast the weather conditions that are predictable on the basis of sunspot activity.

-- This option says meteorologists already know this relationship from other source of information. So forecast will not improve.
This is the correct answer.
This question baffled me initially. Thanks for taking interest in this post guys.


good work man

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Re: After observing the Earth’s weather patterns [#permalink]

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New post 16 Jul 2010, 06:29
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easy C
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Re: After observing the Earth’s weather patterns [#permalink]

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New post 17 Jul 2010, 09:20
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C makes most sense.

If meteorologist has already been able to forecast weather conditions with other evidences than saying that sunspot activity will help M to improve the forecast is weakened.

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Re: After observing the Earth’s weather patterns [#permalink]

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New post 02 Aug 2010, 12:41
C for me too ........but came to it by POE .............good explanations thanks

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New post 02 Aug 2010, 21:11
Option E.. is it a flaw in reasoning here?

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Re: After observing the Earth’s weather patterns [#permalink]

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New post 12 Sep 2010, 03:06
Close one
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Re: After observing the Earth’s weather patterns [#permalink]

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New post 12 Sep 2010, 19:54
+1 for C

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Re: After observing the Earth’s weather patterns   [#permalink] 12 Sep 2010, 19:54

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