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# Neurons in the brain form cohesive decision groups by joining through

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Manager
Joined: 21 May 2017
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Neurons in the brain form cohesive decision groups by joining through  [#permalink]

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14 Oct 2018, 00:30
4
00:00

Difficulty:

95% (hard)

Question Stats:

27% (01:25) correct 73% (01:18) wrong based on 139 sessions

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Neurons in the brain form cohesive decision groups by joining through pathways during any decision-making process. The number of neurons that join must be optimal for any decision to be properly made. If more neurons than required join, then the mind may start thinking in tangential direction. If fewer neurons than needed join, then the decision-making process may not get done properly.

Which of the following conclusions can be drawn based on the information provided in the passage?

(A) It is highly unlikely that the brain will be able to make an optimal decision once it starts thinking tangentially due to an excess of neurons involved.

(B) Since the total number of neurons in the brain start to decline after 30 years of age, the decision-making capability of an individual also declines.

(C) Poor decisions are caused either by an excess of neurons or an inadequacy of the same.

(D) Decisions in which an adequate number of neurons are involved are usually optimal.

(E) It's better to have more neurons than to have fewer.
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Re: Neurons in the brain form cohesive decision groups by joining through  [#permalink]

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15 Oct 2018, 01:51
1
Is there a thinking approach where we can cross out D. Too many neurons are unfit and too few not enough, thus we need a suitable number of neurons ....Answer A is great but only covers tangential thinking yet D hits both.
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15 Oct 2018, 03:53
sony1000 wrote:
Is there a thinking approach where we can cross out D. Too many neurons are unfit and too few not enough, thus we need a suitable number of neurons ....Answer A is great but only covers tangential thinking yet D hits both.

sony1000
Choice D says that Decisions in which an adequate number of neurons are involved are usually optimal.
But
The passage merely says that adequate number of neurons in a decision group is required to make optimal decisions.
However, this does not mean that this is the only condition.
There could be other conditions as well.
Hence we cannot infer that a decision will be optimal just because one requirement is satisfied.
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Re: Neurons in the brain form cohesive decision groups by joining through  [#permalink]

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15 Oct 2018, 07:05
Thanks for yout input zac123. So basically the fact that I am unable to get the optimal answer to get this question right is not just that I did not join the adequate number of neurons but there might be other conditions involved...
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Re: Neurons in the brain form cohesive decision groups by joining through  [#permalink]

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15 Oct 2018, 09:11
sony1000 wrote:
Thanks for yout input zac123. So basically the fact that I am unable to get the optimal answer to get this question right is not just that I did not join the adequate number of neurons but there might be other conditions involved...

yes sony1000 , here in the argument its written that adequate no. of neurons are required for any decision to be properly made. But we cannot conclude that all the decisions made with adequate neurons will be optimal or not.
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Re: Neurons in the brain form cohesive decision groups by joining through  [#permalink]

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15 Oct 2018, 10:09
zac123 Could you please post an OE for this question?
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15 Oct 2018, 10:46
csaluja wrote:
zac123 Could you please post an OE for this question?

A. It is highly unlikely that the brain will be able to make an optimal decision once it starts thinking tangentially due to an excess of neurons involved.

Understand the choice
In the situation that a excess of neurons are involved, it is not likely that the brain will be able to make an optimal decision.
Analyze in the context of the passage and Question Stem
The passage clearly tells us that if more number of neurons are involved, then the brain will start thinking tangentially – implying that the decision making won’t be optimal.
So, this statement is supported by the passage.

B. Since the total number of neurons in the brain start to decline after 30 years of age, the decision-making capability of an individual also declines.

Understand the choice
This choice presents us a fact as a cause and a its subsequent result.
Cause: Total number of neurons in brain start to decline after 30 years of age.
Effect: Decision-making capability also declines
Analyze in the context of the passage and Question Stem
The passage merely tells us that in a decision group, an optimal number of neurons need to be involved.
So, even if the total number of neurons in the brain decline, it does not mean that there won’t be sufficient number of neurons to form decision groups or that optimal number of neurons won’t be involved in the formation of decision groups.
So, this option statement is not supported by the passage.

C. Poor decisions are caused either by an excess of neurons or an inadequacy of the same.

Understand the choice
Per this choice, an individual makes poor choices because of the presence of excess or inadequate number of neurons.
Analyze in context of the passage
The passage does not talk about poor decisions.
Moreover, the passage talks about excess and inadequate number of neurons in a decision group.
This option talks about excess neurons (and inadequate number of neurons) in general in the brain.
So, this option statement is not supported by the passage.

D Decisions in which an adequate number of neurons are involved are usually optimal.

Understand the choice
Every decision in which adequate number of neurons are involved is optimal.
Analyze in context of the passage
The passage merely says that adequate number of neurons in a decision group is required to make optimal decisions.
However, this does not mean that this is the only condition.
There could be other conditions as well.
Hence we cannot infer that a decision will be optimal just because one requirement is satisfied.

E It's better to have more neurons than to have fewer.

Understand the choice
More neurons are better than fewer neurons.
Better in what regards? The option statement doesn’t convey a clear meaning.
It seems to be saying that in general, more neurons are better than fewer neurons.
Analyze in context of the passage
The passage does not debate the merits/demerits of more neurons and fewer neurons in general.
Hence this option is not supported by the passage.
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Re: Neurons in the brain form cohesive decision groups by joining through  [#permalink]

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15 Oct 2018, 19:32
1
Neurons in the brain form cohesive decision groups by joining through pathways during any decision-making process. The number of neurons that join must be optimal for any decision to be properly made. If more neurons than required join, then the mind may start thinking in tangential direction. If fewer neurons than needed join, then the decision-making process may not get done properly.

Analysis-
1) key points-
> Neurons form cohesive groups in ANY decision groups
>No. Of NEURONS MUST be OPTIMAL for ANY DECISION to be PROPERLY MADE
>More N= MAYBE tang thinking
> Less N= MAYBE process not properly done

2+2 inference- a decision in which the neurons involved are either less or more the PROBABILITY( we are not sure as "may" is used in all premises) OF NOT MAKING a decision properly is High

Question- not a must be true. It is a conclusion question , the closest and most supported answer. DON'T try to make it MUST BE TRUE

Which of the following conclusions can be drawn based on the information provided in the passage?

A
It is highly unlikely that the brain will be able to make an optimal decision once it starts thinking tangentially due to an excess of neurons involved.
- highly unlikely ( good phrase- goes with the overall tone of the passage as there are no definitive premises) keep it.

B
Since the total number of neurons in the brain start to decline after 30 years of age, the decision-making capability of an individual also declines.
- total number , age- not mentioned- OOS

C. Poor decisions are caused either by an excess of neurons or an inadequacy of the same.
- POOR DECISIONS - author only says DECISION CAN BE MADE PROPERLY . A properly made decision can be poor. Out of context.

D.Decisions in which an adequate number of neurons are involved are usually optimal.
- closely related to passage- keep it

E
It's better to have more neurons than to have fewer.
- Author does not give ANY PREFERENCE. OOS

( Do the above POE in 10 seconds)

A and D-

A. It is highly unlikely that the brain will be able to make an optimal decision once it starts thinking tangentially due to an excess of neurons involved.
- highly unlikely ( good phrase- the AC gives a probability and not a definitive choice by saying (brain will not be able to make optimal decision if...) There is a possibility of optimal decision even with inadequate neurons.

D.Decisions in which an adequate number of neurons are involved are usually optimal.
- reverse logic( GMAT TRAP) : again optimal number of neurons are required to make PROPER ( not optimal) decisions . The decisions made may or may not be optimal - OUT OF CONTEXT

Why this approach? -
CR questions need a logical approach and tend to take time if you analyse each and every answer by referring back to question.

Step 1: read and understand passage
Step 2: read question ( is it a must be true? Or inference? Or conclusion? Or suggestion)
Step3: according to the question , thinking for some time( don't worry about time).
Try to rephrase the statements ( but remember- dont try to reverse a statement). Join statements and make 1 statement.

(Why do this? This will tell your brain what exactly is there in the passage.. this will help you discard out of scope /context choices within seconds)

Clear out all Out of scope answers. (You don't need to go back to passage as your brain has its feed )

Basically 2 choices will be left. Now see if YOUR inferences are present in the 2 choices. If yes then wait don't answer it immediately.
Read the 2nd and see how far is it from the passage ...

When you are down to 2 choices, your probability of answering a question right is 50% ( now that's a good probability if you are running out of time)

Try this approach: if you have doubts PM me

Posted from my mobile device
Re: Neurons in the brain form cohesive decision groups by joining through   [#permalink] 15 Oct 2018, 19:32
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