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# Dr Khan: Professor Bums recognizes that recent

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Senior Manager
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Dr Khan: Professor Bums recognizes that recent  [#permalink]

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10 Aug 2018, 04:16
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Difficulty:

95% (hard)

Question Stats:

34% (02:22) correct 66% (02:18) wrong based on 254 sessions

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Dr Khan: Professor Bums recognizes that recent observations fail to confirm earlier ones that apparently showed a comet reservoir far out in our solar system. She claims this non-confirmation is enough to show that the earlier observations are incorrect. But the recent observations occurred under poor conditions.

Which one of the following is most supported by Dr. Khan's statements?

A. If the recent observations had been made under good conditions, they would have provided conclusive evidence of a comet reservoir far out in our solar system.

B. Contrary to Professor Bums's view, the recent observations confirm the earlier ones.

C. Professor Bums's claim about the implications of the recent observations is incorrect.

D. The recent observations, even if they had been made under good conditions, would not have been enough to suggest that the earlier ones are incorrect.

E.CThe poor conditions present during recent observations render them worthless.

LSAT
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Re: Dr Khan: Professor Bums recognizes that recent  [#permalink]

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10 Aug 2018, 04:20
Must Be True. The correct answer choice is (C).

The stimulus presents a series of observations made by Dr. Khan regarding Professor Burns. An overt argument is never stated. Since the distinction between fact and opinion is crucial on the GMAT, especially in Must Be True stimuli where the correct answer choice must satisfy the strict parameters of the Prove Test, it is important to analyze each claim as follows:

Earlier observations showed a comet reservoir far out in the solar system, but recent observations cannot confirm this. (Fact)
Professor Burns interprets the recent observations as proof that the comet reservoir doesn’t exist. (Opinion)
The recent observations occurred under poor conditions. (Fact)

Note the use of double negatives in the second sentence of the stimulus: According to Prof. Burns, “this non-confirmation is enough to show that the earlier observations are incorrect.” It is imperative to immediately simplify this statement by removing both negations and distill its meaning: Burns doesn’t believe there is a comet reservoir far out in our solar system. However, since the recent observations occurred under poor conditions, it would be reasonable to doubt their significance: while they cannot prove (or disprove) the existence of a comet reservoir either way, they certainly cast doubt on Professor Burns’s conclusion. In other words, such a reservoir could exist. This prephrase agrees with answer choice (C).

Answer choice (A): Whether the recent observations, if made under good conditions, would have provided conclusive evidence of a comet reservoir is impossible to know. Beware of hypotheticals and speculative claims when answering Must Be True questions: more often than not, such claims are impossible to prove.

Answer choice (B): Just because Professor Burns reached an invalid conclusion does not mean that the recent observations actually confirm the earlier ones, i.e. that a comet reservoir exists. As stated earlier, it is impossible to know from the information provided whether or not such a reservoir actually exists. This answer choice conflates fact and opinion, and is therefore incorrect.

Answer choice (C): This is the correct answer choice. All we know from the facts presented in the stimulus is that the recent observations do not provide a suitable basis for rejecting the earlier ones. Professor Burns, who believes otherwise, is clearly wrong in making her assessment. In other words, her claims about the implications of the recent observations is incorrect—a comet reservoir could exist (we just don’t know).

Answer choice (D): As with answer choice (A), we have a hypothetical, speculative claim that cannot be proven with absolute certainty. It is entirely possible, however unlikely, that if the recent observations had been made under good conditions, they would have been enough to disprove the earlier ones.

Answer choice (E): This answer choice contains an exaggeration (“worthless”) that cannot be substantiated with the information provided. Eliminate.
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Re: Dr Khan: Professor Bums recognizes that recent  [#permalink]

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08 Nov 2018, 00:34
E.CThe poor conditions present during recent observations render them worthless.

Pls remove the C.

Thanks for posting question.
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Re: Dr Khan: Professor Bums recognizes that recent  [#permalink]

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08 Nov 2018, 00:36
AshutoshB wrote:
Must Be True. The correct answer choice is (C).

The stimulus presents a series of observations made by Dr. Khan regarding Professor Burns. An overt argument is never stated. Since the distinction between fact and opinion is crucial on the GMAT, especially in Must Be True stimuli where the correct answer choice must satisfy the strict parameters of the Prove Test, it is important to analyze each claim as follows:

Earlier observations showed a comet reservoir far out in the solar system, but recent observations cannot confirm this. (Fact)
Professor Burns interprets the recent observations as proof that the comet reservoir doesn’t exist. (Opinion)
The recent observations occurred under poor conditions. (Fact)

Note the use of double negatives in the second sentence of the stimulus: According to Prof. Burns, “this non-confirmation is enough to show that the earlier observations are incorrect.” It is imperative to immediately simplify this statement by removing both negations and distill its meaning: Burns doesn’t believe there is a comet reservoir far out in our solar system. However, since the recent observations occurred under poor conditions, it would be reasonable to doubt their significance: while they cannot prove (or disprove) the existence of a comet reservoir either way, they certainly cast doubt on Professor Burns’s conclusion. In other words, such a reservoir could exist. This prephrase agrees with answer choice (C).

Answer choice (A): Whether the recent observations, if made under good conditions, would have provided conclusive evidence of a comet reservoir is impossible to know. Beware of hypotheticals and speculative claims when answering Must Be True questions: more often than not, such claims are impossible to prove.

Answer choice (B): Just because Professor Burns reached an invalid conclusion does not mean that the recent observations actually confirm the earlier ones, i.e. that a comet reservoir exists. As stated earlier, it is impossible to know from the information provided whether or not such a reservoir actually exists. This answer choice conflates fact and opinion, and is therefore incorrect.

Answer choice (C): This is the correct answer choice. All we know from the facts presented in the stimulus is that the recent observations do not provide a suitable basis for rejecting the earlier ones. Professor Burns, who believes otherwise, is clearly wrong in making her assessment. In other words, her claims about the implications of the recent observations is incorrect—a comet reservoir could exist (we just don’t know).

Answer choice (D): As with answer choice (A), we have a hypothetical, speculative claim that cannot be proven with absolute certainty. It is entirely possible, however unlikely, that if the recent observations had been made under good conditions, they would have been enough to disprove the earlier ones.

Answer choice (E): This answer choice contains an exaggeration (“worthless”) that cannot be substantiated with the information provided. Eliminate.

is there a specific strategy to deal with such questions?? if yes pls share.

though i could crack this one.. i err while answer such questions.

Cheers!!
700 = Nirvana (short term)
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Re: Dr Khan: Professor Bums recognizes that recent  [#permalink]

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08 Nov 2018, 04:26
chetan2u mikemcgarry GMATNinja DmitryFarber VeritasPrepBrian GMATNinjaTwo VeritasKarishma

the most probable inference we can draw is that prof. Bumms MAY BE incorrect in her conclusions. She may very well be correct the poor conditions of the exp do not render the observations worthless.. she may very well be correct..
But choice C says that she is definitely WRONG...please respond
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Re: Dr Khan: Professor Bums recognizes that recent  [#permalink]

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08 Nov 2018, 05:11
Dr Khan: Professor Bums recognizes that recent observations fail to confirm earlier ones that apparently showed a comet reservoir far out in our solar system. She claims this non-confirmation is enough to show that the earlier observations are incorrect. But the recent observations occurred under poor conditions.

Which one of the following is most supported by Dr. Khan's statements?

A. If the recent observations had been made under good conditions, they would have provided conclusive evidence of a comet reservoir far out in our solar system.

B. Contrary to Professor Bums's view, the recent observations confirm the earlier ones.

C. Professor Bums's claim about the implications of the recent observations is incorrect.

D. The recent observations, even if they had been made under good conditions, would not have been enough to suggest that the earlier ones are incorrect.

E.CThe poor conditions present during recent observations render them worthless.

+1 for C
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Re: Dr Khan: Professor Bums recognizes that recent  [#permalink]

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26 Nov 2018, 21:27
1
the most probable inference we can draw is that prof. Bumms MAY BE incorrect in her conclusions. She may very well be correct the poor conditions of the exp do not render the observations worthless.. she may very well be correct..
But choice C says that she is definitely WRONG...please respond

Quote:
Dr Khan:

Professor Bums recognizes that recent observations fail to confirm earlier ones that apparently showed a comet reservoir far out in our solar system. She claims this non-confirmation is enough to show that the earlier observations are incorrect. But the recent observations occurred under poor conditions.

The question asks us which of the choices is most supported by Dr. Khan's statements.

Quote:
C. Professor Bums's claim about the implications of the recent observations is incorrect.

• Yes, based on the passage, we'd infer that Dr. Khan is calling Dr. Bums' statement into doubt (not necessarily saying that they're outright wrong).
• Yes, (C) states that Professor Bums's claim is incorrect.
• And yes, (C) is more supported by Dr. Khan's statements than (A), (B), (D), and (E).

When we choose (C), we are not stating that Dr. Khan calls Professor Bums's claim incorrect. We're only saying that (C) is more supported by Dr. Khan's statements than every other choice is. Dr. Khan is leaning towards calling Professor Bums's claim incorrect by calling into doubt the observations underlying Bums's claim. And in the meantime, every other answer is choice is much less supported by Dr. Khan's statements.

This is why (C) remains the best choice.
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Re: Dr Khan: Professor Bums recognizes that recent   [#permalink] 26 Nov 2018, 21:27
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