by ManhattanPrepLSAT1 Fri Apr 05, 2013 5:22 pm
Remember, "only if" introduces something necessary...
Stimulus:
RM --> PC
PC --> TC
~TC
----------
~RM
(A)
JV --> ~MPB
JV --> JLB
JLB
--------------
JV
*wrong because this does not contain two conditionals that link using the transitive property
(B)
GL --> PW
~CI --> ~PW
~CI
----------------
~GL
*correct because the two conditionals link using the transitive property and the situation utilizes the contrapositive of the linked conditionals
(C)
~R + FT --> BF
~FT
------------------
~BF
*wrong because this negates the conditional relationship
(D)
LA --> JA or KA
~KA + JA
-----------------
LA
*wrong because this reverses the conditional relationship
(E)
GM --> MM
MM --> MPMA
MPSA
---------------
MM
*wrong because the conclusion should be about George, we don't know whether Mark has postponed "most" of his appointments, and this reverses the conditional relationship!