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When a planetary system forms, the chances that a planet

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Re: CR - planetary system [#permalink] New post 29 Jul 2011, 05:35
+1 for D
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Re: CR - planetary system [#permalink] New post 29 Jul 2011, 07:37
source? Not a particularly well written question.
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Re: CR - planetary system [#permalink] New post 29 Jul 2011, 11:00
B seems fine. If you eliminate it due to the difference between Survival and Emergence issue, ok, that's right but D is not a good substitute for it. Doesn't it contradict the fact given in the stimulus? In the premises we read that the chances of having large planets in the system to secure emergence of intelligent life is low. However, in choice D it is said that the conclusion is better evaluated if we know about the chances? we ALREADY know and it means the chances are LOW!
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Re: CR - planetary system [#permalink] New post 29 Jul 2011, 11:07
d
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Re: CR - planetary system [#permalink] New post 29 Jul 2011, 16:17
good one..answer is D
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Re: CR - planetary system [#permalink] New post 31 Jul 2011, 04:55
D...
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Re: CR - planetary system [#permalink] New post 04 Aug 2011, 23:59
D
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Re: CR - planetary system [#permalink] New post 05 Aug 2011, 03:04
Ans D is talking about the large plannet, it never talk about the survivial of humen life in contrast to option D option B is talking about life/survival.
Premise says that if there are no large planet then chances are low but no zero and if ppl can survive even after comet than there is no need of large planet.
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Re: CR - planetary system [#permalink] New post 05 Aug 2011, 05:37
Stuck in between B And D but D sounds better!
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Re: CR - planetary system [#permalink] New post 08 Aug 2011, 20:57
I opted for B T.T
Gosh! how can I do better in CR??
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Re: CR - planetary system [#permalink] New post 19 Oct 2011, 21:24
IMO D
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Re: When a planetary system forms, the chances that a planet [#permalink] New post 02 Aug 2012, 05:23
The fundamental problem with B I thought was not that there is a Survival or Emergence issue. The problem was it goes beyond the argument, Hence out of scope. When you have out of scope, answering the question still means that you will have to speculate at some level.

E.g. Even if we knew that the species survived after a large comet attack, how would that help us evaluate whether chance of survival of the remaining species.
Let's say two comets would wipe out the planet but 1 planet allows the species to survive. You would still need to know how many comets are going to hit the planet, right? So, this ambiguity means I can't really say whether statement B helps me assess the chances of survival or emergence of the species on the planet.
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Re: When a planetary system forms, the chances that a planet [#permalink] New post 02 Aug 2012, 05:56
Nice piecemeal analysis by Gixxer1000. Good job.
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Re: When a planetary system forms, the chances that a planet [#permalink] New post 02 Aug 2012, 06:09
I was got stuck between (B) and (D) but after reading the post i could finally understand , hope i don't get stuck on the D-day.
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Re: CR - planetary system [#permalink] New post 02 Aug 2012, 12:52
deepakdewani wrote:
Well, B and D clearly are the choices which are worthy of further evaluation on a test day. I chose B but I understand that it is not the perfect choice considering the argument talks of the "emergence" of intelligent life whereas option B talks about survival. Technically, emergence (birth, beginning) is different from survival.

But here's my problem with D: the option says "how high the chances are that planetary systems will contain many large comets". In my view, while the existence of large comets is critical for the conclusion to hold true, nowhere in the argument is there an evidence that "many" large coments are required for a planet to be "frequently struck by large comets". It may well be the case that one or two large comets are responsible for frequent strikes to the Earth. If that is the case, the presence / absence of "many" large coments does not have a bearing on the conclusion. What will make more sense is an aswer choice which states that "how high the chances are that planetary systems will contain any large comets"

Makes sense?


I agree with your assessment and i arrived at the same conclusion.
Choice (D) looks to me like a classic shell answer. One that contains all the right words, but doesn't provide any additional relevant data.
As per the premises, The sole purpose of large planets such as Jupiter and Saturn is to deflect comets. That's the premise. However, we need to understand if the danger from comets is very real, or if it is exaggerated. . Think of it this way. Many countries stock pile nuclear weapons, claiming that these weapons serve as deterrents. So to understand if nuclear weapons are required, one needs to understand if the threat from other countries is real, or an imagined one.

Back to the question...How does it matter, if a planetary system contains many comets, if these comets dont strike the planets which support life.
These comets may be in totally different orbits and may never collide with the planets.

I would agree with (D), if the answer choice was worded as follows
How high are the chances of deadly collisions between comets and the planets.
If the chances are very low, then this implies that the "deflecting services" of the large planets are unnecessary.
If the chances are high, then this implies that the "deflecting services" of the large planets are very necessary.
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Re: When a planetary system forms, the chances that a planet [#permalink] New post 03 Aug 2012, 12:04
Took some time to zero in on D. The reasoning was similar to a few previous explanations. If there are many large comets then the chances/possibilities of collision increase leading to reduced chances of intelligent life growth.

Good question.
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Re: CR - planetary system [#permalink] New post 03 Aug 2012, 12:23
deepakdewani wrote:
Well, B and D clearly are the choices which are worthy of further evaluation on a test day. I chose B but I understand that it is not the perfect choice considering the argument talks of the "emergence" of intelligent life whereas option B talks about survival. Technically, emergence (birth, beginning) is different from survival.

But here's my problem with D: the option says "how high the chances are that planetary systems will contain many large comets". In my view, while the existence of large comets is critical for the conclusion to hold true, nowhere in the argument is there an evidence that "many" large coments are required for a planet to be "frequently struck by large comets". It may well be the case that one or two large comets are responsible for frequent strikes to the Earth. If that is the case, the presence / absence of "many" large coments does not have a bearing on the conclusion. What will make more sense is an aswer choice which states that "how high the chances are that planetary systems will contain any large comets"

Makes sense?


I agree....

D also seems weird as comets need not be contained in the planetary system, they could as well come from outside. B is also not very clear, but I thought D was closer
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Re: When a planetary system forms, the chances that a planet [#permalink] New post 02 Aug 2013, 06:42
priyankur_saha@ml.com 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 systems 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 by 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




IMO
D is correct

The reasoning was similar to a few previous explanations. If there are many large comets then the chances/possibilities of collision increase leading to reduced chances of intelligent life growth.
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Re: When a planetary system forms, the chances that a planet [#permalink] New post 03 Aug 2014, 23:18
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