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p. 7-39, #5

LSAT Apprentice
Posts: 19
Joined: Thu Jun 07, 2018 7:05 pm
Points: 19


I put B :arrow: notA for the answer to this question, but the answer key says that it is notA :arrow: B instead. Would my answer work just as good? If not, what is the problem with it? Please let me know ASAP. Thanks!
Robert Carroll
PowerScore Staff
PowerScore Staff
Posts: 488
Joined: Fri Dec 06, 2013 7:18 am
Points: 424


Your answer is a Mistaken Reversal of what's required. The answer key is correct. "B :arrow: A" is also an acceptable answer, as it is the contrapositive of the answer key's conditional. The resulting chain is:

A :arrow: B :arrow: C

Which of course proves A :arrow: C.

Robert Carroll