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## #12 - Local, Cannot Be True

Dave Killoran
• PowerScore Staff
• Posts: 5807
• Joined: Mar 25, 2011
#27439
Complete Question Explanation
(The complete setup for this game can be found here: lsat/viewtopic.php?t=1891)

The correct answer choice is (A)

If new soul is the only type of new CD on sale, then all other new types of CDs are not on sale. From the contrapositive of the fourth rule, then, if new pop is not on sale, then at least one type of jazz must be on sale. Since new jazz cannot be on sale, used jazz must be on sale. Therefore, answer choice (A) cannot be true and is correct.
szamias
• Posts: 7
• Joined: Jun 01, 2012
#4321
Hi Dave, thanks, again. I just did this question. Being that I read your advice prior to doing the problem I found it easier to take in.

This is how I set up the game:

N / U
J
O ------
P X
R
S

RULES:
(CONTRA+'s):

NP + UP => NS + US
(no NS or no US => no NP or no UP)

NJ + UJ => no NR + no UR
(NR or UR => no NJ or no UJ )

no NJ + no UJ => NP
(no NP => NJ or UJ)

NR or UR => no NS + no US
(NS or US => no NR + no UR )

NR or UR => no NS + no US => no NP or no UP

NR or UR => no NJ or no UJ => MAYBE NP (if both NJ and UJ)

With all of that being said (or written, if you will) I don't understand why Q. # 12 is A.

Thoughts?

Thanks!!
Dave Killoran
• PowerScore Staff
• Posts: 5807
• Joined: Mar 25, 2011
#4322
Hey Szamias,

Here's the explanation to #12:

If new soul is the only type of new CD on sale, then all other new types of CDs are not on sale. From the contrapositive of the fourth rule, then, if new pop is not on sale, then at least one type of jazz must be on sale. Since new jazz cannot be on sale, used jazz must be on sale. Therefore, answer choice (A) cannot be true and is correct.

Please let me know if that helps. Thanks!
szamias
• Posts: 7
• Joined: Jun 01, 2012
#4323