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- Sat Jan 21, 2012 12:00 am
#60226
Complete Question Explanation
(The complete setup for this game can be found here: lsat/viewtopic.php?t=6469)
The correct answer choice is (E)
The question stem indicates that T and Z appear in a photograph. As discussed before, because Z is a random you should ignore Z in your consideration of who can and cannot appear together in a photograph. Consequently, let’s revisit what we know about T:
Thus, when T is in a photograph, then W, S, and U cannot appear in that photograph. Consequently, answer choice (E) must be correct.
Another way of thinking about this question would be to apply the fourth rule and conclude that when T is in a photograph then W is not in that photograph. Then, using the contrapositive of the first two rules, we can conclude that when W is not in a photograph, then S is not in that photograph, and U is not in that photograph.
Answer choice (A): This answer is incorrect because S cannot appear in any photograph that T appears in.
Answer choice (B): This answer choice is incorrect because although Y could appear in a photograph with T, Y does not have to appear in a photograph when T is in that photograph.
Answer choice (C): This answer is incorrect because W cannot appear in any photograph that T appears in.
Answer choice (D): This answer choice is incorrect because although R does not have to appear in a photograph with T, R could appear in a photograph when T is in that photograph.
Note also the language used in the five answer choices: the first three answer choices specify variables that must appear with T (positive relationships), whereas the last two answers specify variables that cannot appear with T (negative relationships). Always make sure to read each answer choice closely, because the addition of “not” changes the entire meaning of the answer choice!
(The complete setup for this game can be found here: lsat/viewtopic.php?t=6469)
The correct answer choice is (E)
The question stem indicates that T and Z appear in a photograph. As discussed before, because Z is a random you should ignore Z in your consideration of who can and cannot appear together in a photograph. Consequently, let’s revisit what we know about T:
Thus, when T is in a photograph, then W, S, and U cannot appear in that photograph. Consequently, answer choice (E) must be correct.
Another way of thinking about this question would be to apply the fourth rule and conclude that when T is in a photograph then W is not in that photograph. Then, using the contrapositive of the first two rules, we can conclude that when W is not in a photograph, then S is not in that photograph, and U is not in that photograph.
Answer choice (A): This answer is incorrect because S cannot appear in any photograph that T appears in.
Answer choice (B): This answer choice is incorrect because although Y could appear in a photograph with T, Y does not have to appear in a photograph when T is in that photograph.
Answer choice (C): This answer is incorrect because W cannot appear in any photograph that T appears in.
Answer choice (D): This answer choice is incorrect because although R does not have to appear in a photograph with T, R could appear in a photograph when T is in that photograph.
Note also the language used in the five answer choices: the first three answer choices specify variables that must appear with T (positive relationships), whereas the last two answers specify variables that cannot appear with T (negative relationships). Always make sure to read each answer choice closely, because the addition of “not” changes the entire meaning of the answer choice!
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Dave Killoran
PowerScore Test Preparation
Follow me on Twitter at http://twitter.com/DaveKilloran
My LSAT Articles: http://blog.powerscore.com/lsat/author/dave-killoran
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PowerScore Test Preparation
Follow me on Twitter at http://twitter.com/DaveKilloran
My LSAT Articles: http://blog.powerscore.com/lsat/author/dave-killoran
PowerScore PodCast: http://www.powerscore.com/lsat/podcast/
