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When a planetary system forms, the chances that a planet

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Re: When a planetary system forms [#permalink] New post 05 Aug 2010, 12:04
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Re: When a planetary system forms [#permalink] New post 05 Aug 2010, 13:15
I got D.

The conclusion says, "Since planetary systems are unlikely to contain any large planets, the chances that intelligent life will emerge on a planet are, therefore, low." Addresses the likelihood of any big planets (1 OR 2). Exploring the likelihood of comets would be additive to this. I think readdressing the "unlikely to contain ANY large planets" statement doesn't make as much sense.
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Re: When a planetary system forms [#permalink] New post 05 Aug 2010, 13:39
i went with C. but D seems right too although it wasn't really stated in the conclusion.
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Re: When a planetary system forms [#permalink] New post 06 Aug 2010, 05:30
Conclusion : Since planetary systems are unlikely to contain any large planets, the chances that intelligent life will emerge on a planet are, therefore, low. -------->
Since the chances of large planets are low. That means we have less Jupiters and Saturns that deflect the comet. The argument rests on the number of comets in the planetary system. The more the comets the faster the extinction of the intelligent life. :-D

B is out of whack LOLs. I hope that never happens.

(C) whether large comets could be deflected by only one large planet rather than be two ---> OUT for the reason above

(D) how high the chances are that planetary systems will contain many large comets ----> Yes this is essential to the argument. In the absence or less Jupiters and Saturns we need to evaluate the probability or the number of comets in the planetary system which are in collision course with the intelligent planets such as Earth.

(E) how likely it is that planetary systems containing large planets will also contain planets the size of Earth -----> This evaluation is useless. The argument rests on the number of comets NOT on the number of intelligent planets.

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Re: When a planetary system forms [#permalink] New post 11 Sep 2010, 07:49
I think its D
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Re: When a planetary system forms [#permalink] New post 19 Apr 2011, 21:44
The answer is D.
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Re: When a planetary system forms [#permalink] New post 16 Jun 2011, 01:16
POE A and E.
use variance test on B,C and D.

C is clearly neutral here.

B does not crash the conclusion. D holds still.
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Re: When a planetary system forms, the chances that a planet [#permalink] New post 16 Apr 2012, 07:31
What is wrong with choice (B)?
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Re: When a planetary system forms, the chances that a planet [#permalink] New post 18 Apr 2012, 00:00
Quote:
how high the chances are that planetary systems will contain many large comets


How come a planetary system may contain large comets in it?

How much does the question mentions about the comets? so how choices c and d are effective?
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Re: When a planetary system forms, the chances that a planet [#permalink] New post 18 Apr 2012, 01:13
noboru wrote:
When a planetary system forms, the chances that a planet capable of supporting life will be formed are high. The chances that a large planet the size of Jupiter or Saturn will be formed, however, are low. Without Jupiter and Saturn, whose gravitational forces have prevented Earth from being frequently struck by large comets, intelligent life would never have arisen on Earth. Since planetary systems are unlikely to contain any large planets, the chances that intelligent life will emerge on a planet are, therefore, low.
Knowing which one of the following would be most useful in evaluating the argument?
(A) whether all planetary system are formed from similar amounts of matter
(B) whether intelligent species would be likely to survive if a comet struck their planet
(C) whether large comets could be deflected by only one large planet rather than be two
(D) how high the chances are that planetary systems will contain many large comets
(E) how likely it is that planetary systems containing large planets will also contain planets the size of Earth


In order to evaluate this choice, we have to find the premise of this argument. That is:

(X) planetary systems are unlikely to contain any large planets
=> (Y) the chances that intelligent life will emerge on a planet are low

Choice D stated that the % of planetary system have large comets will be useful to evaluate the frequency of struck planets. This result will be helpful to know whether the life have emerge on Earth or not.
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Re: When a planetary system forms, the chances that a planet [#permalink] New post 18 Apr 2012, 20:32
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I say B

As comets are not part of a planetary system, but inter-planetary system celestial objects... the possibility of being hit by one depends on the presence of large planets. However, the possibility of evolution of intelligent species is different and depends on their ability to survive a similar comet strike.


Let me know if the above argument seems flawed?
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Re: When a planetary system forms, the chances that a planet [#permalink] New post 21 Apr 2012, 00:00
charlemagne wrote:
I say B

As comets are not part of a planetary system, but inter-planetary system celestial objects... the possibility of being hit by one depends on the presence of large planets. However, the possibility of evolution of intelligent species is different and depends on their ability to survive a similar comet strike.


Let me know if the above argument seems flawed?



Wassup?? Am I hitting a general expected downtime, or all my posts being sidestepped too often!
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Re: When a planetary system forms, the chances that a planet   [#permalink] 21 Apr 2012, 00:00
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