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04 Sep 2018, 05:55
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Difficulty:
25%
(medium)
Question Stats:
77% (01:23) correct
23%
(01:46)
wrong
based on 2887
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Y has been believed to cause Z. A new report, noting that Y and Z are often observed to be preceded by X, suggests that X, not Y, may be the cause of Z.
Which of the following further observations would best support the new report’s suggestion?
(A) In cases where X occurs but Y does not, X is usually followed by Z.
(B) In cases where X occurs, followed by Y, Y is usually followed by Z.
(C) In cases where Y occurs but X does not, Y is usually followed by Z.
(D) In cases where Y occurs but Z does not, Y is usually preceded by X.
(E) In cases where Z occurs, it is usually preceded by X and Y.
Which of the following further observations would best support the new report’s suggestion?
(A) In cases where X occurs but Y does not, X is usually followed by Z.
(B) In cases where X occurs, followed by Y, Y is usually followed by Z.
(C) In cases where Y occurs but X does not, Y is usually followed by Z.
(D) In cases where Y occurs but Z does not, Y is usually preceded by X.
(E) In cases where Z occurs, it is usually preceded by X and Y.
21 Nov 2018, 00:10
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Bunuel
Old Belief: Y --> Z
New Observation: X --> Y, Z
New Suggestion:
X --> Z
Y -/-> Z
We need the observation that strengthens that X, not Y, causes Z.
(A) In cases where X occurs but Y does not, X is usually followed by Z.
Perfect. When X occurs, but Y does not, often Z occurs. So it does seem to show that X, not Y, causes Z.
(B) In cases where X occurs, followed by Y, Y is usually followed by Z.
This could mean that X causes Y and then Y causes Z. But we are to conclude that X, NOT Y, causes Z. So wrong.
(C) In cases where Y occurs but X does not, Y is usually followed by Z.
This shows that Y --> Z. Wrong
(D) In cases where Y occurs but Z does not, Y is usually preceded by X.
It seems X does not cause Z in this case.
(E) In cases where Z occurs, it is usually preceded by X and Y.
Here either X or Y could cause Z. No conclusion.
Answer (A)
General Discussion
04 Sep 2018, 06:24
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Any scenario in which x in the absence of y results into z, will strengthen the argument.
A) correct
Sent from my iPhone using GMAT Club Forum mobile app
A) correct
Sent from my iPhone using GMAT Club Forum mobile app
