by ManhattanPrepLSAT1 Sat Sep 18, 2010 2:50 pm
That's definitely a reason to eliminate. Another way of looking at it is that the premises have no similar term so, the transitive property cannot be employed.
Great work!
For others, just in case someone would like to see this worked out.
Stimulus:
CM ---> ~ROA
~B ---> CM
----------------
ROA ---> B
Here are the answer choices put into notation. You can see that the stimulus is a valid argument that applies the transitive property and relies on a contrapositive. Only answer choice (C) accomplishes both.
(A)
~TS ---> ~LS
~LS ---> ~SB
---------------
TS
(B)
~G ---> ~EW
~T ---> RW
--------------
EW ---> RG
(C)
WC ---> ~IGP
~NCD ---> WC
---------------
IGP ---> NCD
(D)
~T ---> ~GA
~EE ---> T
--------------
T ---> ~EE
(E)
SM ---> ~W
~H ---> SM
------------
W ---> ~H