This question involves a whole bunch of conditional reasoning chains and I wanted to throw out how I understood the problem to see if I got it right.
"Any writer whose purpose is personal expression sometimes uses words ambiguously." I symbolized this as:
PE ----> SWA
(PE: Writers whose purpose = personal expression, SWA: sometimes use words ambiguously)
"Every poet's purpose is personal expression" resulted in:
P ----> PE -----> SWA
(P = poet)
"Thus no poetry reader's enjoyment depends on attaining a precise understanding of what the poet means." This resulted in a new conditional reasoning chain:
PR -----> ~DPU
(PR: poetry reader; DPU: enjoyment depends on precise understanding of writer)
I originally thought I should diagram this as:
~PR -----> DPU
but then the contrapositive (~DPU -----> PR) seemed to exclude too many other types of readers.
Answer C (the correct answer) is "No writer who ever uses words ambiguously has any reader whose enjoyment depends on attaining a precise understanding of what the writer means" and could be diagrammed as:
SWA -----> R ------>~DPU
Answer A is wrong because of it's really tricky rewording of the stimulus. "Try to attain" does not equal "depend on attaining." Otherwise the conditional reasoning is equal to C.
Did I do this right? And is my symbolization of the "poetry reader" statement in the stimulus correct? Thanks!