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Whenever a star transforms into a supernova, it exhibits surges of act

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Bunuel
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Whenever a star transforms into a supernova, it exhibits surges of act [#permalink] New post   08 Nov 2021, 03:00
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Whenever a star transforms into a supernova, it exhibits surges of activity prior to the transformation. The star LV-426 has recently been exhibiting signs of turbulent activity. In the past, scientists speculated over whether LV-426 could become a supernova, but dismissed the possibility since the star was dormant for a prolonged period of time. Given the star’s recent activity, it is now certain that LV-426 will explode in to a supernova.

Which of the following would it be most useful to determine in order to evaluate the argument?

(A) Whether LV-426 is of the same size as other stars that have exploded into supernovas
(B) Whether other stars that became supernovas also exhibited periods of dormancy
(C) Whether turbulent activity can indicate that a star is about to transform into an entity other than supernova
(D) Whether a period of dormancy can reduce a star’s core temperature to a level at which the star can no longer exhibit surface-level activity
(E) Whether the scientists who studied LV-426 in the past considered the possibility that the star’s period of dormancy may not last
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Re: Whenever a star transforms into a supernova, it exhibits surges of act [#permalink] New post   08 Nov 2021, 03:34
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A) Irrelevant. The size of the star was never a reason behind why it may or may not one day become a supernova. Incorrect

B) Evaluating whether other stars may have also gone through a period of dormancy before becoming a supernova does not do enough to solidify or weaken the argument. While some stars may have gone on to become supernovas, others may have not. This does not provide enough to evaluate the certainty of the argument. Incorrect

C) This would without a doubt provide enough everything needed to evaluate the certainty of the argument. If the turbulent activity can indicate that the star can transform into something else, then there cannot be any certainty. However, if turbulent activity indicates that a star will transform into a supernova, then the argument is 100% solidified. Correct

D) The core temperature is completely irrelevant to the argument. Incorrect

E) We are told in the passage that scientists dismissed the possibility of LV-426 becoming a supernova because of its dormancy. Incorrect

Answer C
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Re: Whenever a star transforms into a supernova, it exhibits surges of act [#permalink] New post   22 May 2022, 08:36
Hi Expert, I have a doubt about choice C.

I agree that if we answer yes to that question, we decrease our belief in the conclusion, but if we answer NO, how this can help us evaluate the conclusion?

We only know that when a star is about to transform into a supernova, it exhibits TA, but we can't say the contrary, that is, that when a star exhibits TA is about to transform.

So, even if C is negated, we could have a possibility that the star doesn't transform at all.


Could you please clarify?
Regards.
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Re: Whenever a star transforms into a supernova, it exhibits surges of act [#permalink] New post   30 May 2022, 12:43
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Gio96 wrote:
Hi Expert, I have a doubt about choice C.

I agree that if we answer yes to that question, we decrease our belief in the conclusion, but if we answer NO, how this can help us evaluate the conclusion?

We only know that when a star is about to transform into a supernova, it exhibits TA, but we can't say the contrary, that is, that when a star exhibits TA is about to transform.

So, even if C is negated, we could have a possibility that the star doesn't transform at all.


Could you please clarify?
Regards.


Let me try to help here.

Let
A - a star transforms into a supernova
B - It exhibits surges of activity

In the first line, it says A->B (ie: A leads to B).
It does not say whether B->A (ie: a surge in activity may not lead to a supernova. It may so happen that a surge in activity might lead to its death, etc.)

But the scientists are now predicting a surge in activity will CERTAINLY lead to an explosion into a supernova. (ie: B ->A.)

So in C, we are essentially getting the answer for whether B->A ( ie: if it does not lead to something other than a supernova, then we can conclude B->A)

Regards.
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Whenever a star transforms into a supernova, it exhibits surges of act [#permalink] New post   30 May 2022, 13:58
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Gio96 wrote:
Hi Expert, I have a doubt about choice C.

I agree that if we answer yes to that question, we decrease our belief in the conclusion, but if we answer NO, how this can help us evaluate the conclusion?

We only know that when a star is about to transform into a supernova, it exhibits TA, but we can't say the contrary, that is, that when a star exhibits TA is about to transform.

So, even if C is negated, we could have a possibility that the star doesn't transform at all.


Could you please clarify?
Regards.

Conclusion: it is now certain that LV-426 will explode in to a supernova.

Part 1 (Yes)
(C) Whether turbulent activity CAN indicate that a star is about to transform into an entity other than supernova

Part 2 (No)
(C) Whether turbulent activity CANNOT indicate that a star is about to transform into an entity other than supernova


In both cases, it evaluates the argument. I guess you got confused with finding the assumption of the argument; that is when we use negation.
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Whenever a star transforms into a supernova, it exhibits surges of act [#permalink] New post   13 Mar 2024, 10:44
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­Let us break down the argument and understand it in a better way:

Whenever a star transforms into a supernova, it exhibits surges of activity prior to the transformation. 
  • Surges of activity prior to transformation is the sign that a star is transforming into supernova

The star LV-426 has recently been exhibiting signs of turbulent activity. 
  • We can predict that the scientists are probably saying that LV-426 is going to convert to a supernova.

In the past, scientists speculated over whether LV-426 could become a supernova, but dismissed the possibility since the star was dormant for a prolonged period of time. 
  • Since, the star was dormant for a longer period of time, scientists dismissed the possibility of it converting into a supernova.

Given the star’s recent activity, it is now certain that LV-426 will explode in to a supernova.
  • But, again due to surges in activity, it is now guranteed that LV-426 will explode into a supernova.

We need to choose an option that affects the conclusion that LV-426 will explode into a supernova 

(A) Whether LV-426 is of the same size as other stars that have exploded into supernovas. - Incorrect
  • Size of the stars is not a matter of concern.
  • Nothing is mentioned in the argument pertaining to the size of the stars while converting into supernovas

(B) Whether other stars that became supernovas also exhibited periods of dormancy. - Incorrect
  • There might be cases where the stars did not exhibit dormancy but still converted to supernovas. 
  • Hence, this answer choice should be eliminated

(C) Whether turbulent activity can indicate that a star is about to transform into an entity other than supernova. - Correct
  • If YES -->> There is the possibility that the conclusion 'LV-426 will convert to a supernova' might not come true as LV-426 might convert into a different entity.
  • If NO -->> There is a possibility that LV-426 will convert to a supernova since there is no other entity that exhibits a surge in activity when converting to an entity.

(D) Whether a period of dormancy can reduce a star’s core temperature to a level at which the star can no longer exhibit surface-level activity. - Incorrect
  • Argument has not mentioned anything specifically about the star’s core temperature.
  • Hence, this option choice is irrelevant.

(E) Whether the scientists who studied LV-426 in the past considered the possibility that the star’s period of dormancy may not last. - Incorrect
  • If YES -->> If they might have considered the possibility that the dormancy period might last, why did they speculate that the star will not convert to a supernova in the first place. This option is changing the premise that 'dismissed the possibility since the star was dormant for a prolonged period of time'  (which cannot be modified in any case on the GMAT)
  • If NO -->> If they have not considered that the dormancy period may last, again it casts a doubt on the premise.
  • Hence, this answer choice should be eliminated.
­
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Re: Whenever a star transforms into a supernova, it exhibits surges of act [#permalink] New post   17 Apr 2024, 02:20
KarishmaB, inputs for option B and C here
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Re: Whenever a star transforms into a supernova, it exhibits surges of act [#permalink]
17 Apr 2024, 02:20
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