by ManhattanPrepLSAT1 Thu Sep 09, 2010 3:32 am
Oh I forgot about this question, but I love it! I taught this one for years in class, and it really stays true to the concepts of conditional relationships.
While these questions make up only 20% of all LR questions, they make up nearly 40-50% of the LR questions that people ask about.
"when, and only when" introduces a biconditional, so we'll use a double headed arrow to represent the conditional relationship.
J <--> RBL + (IT --> EA + JOE)
the contrapositive
~J <--> ~RBL or ~(IT --> EA + JOE)
(Notation Key: J = just, RBL = right to basic liberties, IT= inequalities tolerated, EA = everyone's advantage, JOE = jobs open to everyone)
Just, when and only when, each person has a right to basic liberties, and if inequalities are tolerated then they must be to everyone's advantage and attached to jobs open to everyone.
Note that the contrapositive reads if there is not an equal right to basic liberties or the conditional relationship regarding inequalities tolerated is not true, then the society is not just. This is expressed in answer choice (D).
(A) is close but goes wrong when it says the jobs are open to most people. We need them to be open to everyone, in order to establish that the society is just.
(B) doesn't tell us whether those inequalities that are tolerated are or are not those inequalities are to everyone's advantage or whether they are attached to jobs open to everyone.
(C) fails to mention whether each person has a right to basic liberties.
(E) doesn't tell us whether those inequalities that are tolerated are to everyone's advantage.
Does that clear it up?
#OfficialExplanation