lsat 1-6

crusaders

i am mindfree nn' fans
Pls allow me to show something interesting

L1 No senator spoke at the convention unless he or she was Democrat.
-(Senator + spoke) =-Democrat
----->If a senator spoke at the convention, he or she must be a Democrat.
------>Senator + spoke = Democrat
L2 No Democrat both spoke at the convention and was a senator.
-(Democrat + spoke) =Senator
----->ALL Democrat spoke at the convention was not a senator.
----->Democrat + spoke= -Senator

推导
Senator + spoke =Democrat
Democrat + spoke =-Senator
-------------------------------------------------------
Senator +spoke +spoke = -Sentor
2Senator=-2spoke
spoke=-Senator
senator=not + spoke

A.Spoke=Senator
B.Spoke=-Democrat
(迷惑选项)C.Only Democrats spoke at the convention.
从仅有的以知条件中推不出Democrats=spoke来.
D.Spoke=-Senator(答案)
E.Democratsenator=Spoke(无关)

[此贴子已经被作者于2003-12-19 2:05:17编辑过]