by bbirdwell Fri Apr 20, 2012 7:19 pm
Let's be clear about our task: Find a general rule that supports the reasoning in the argument, that is, a rule that supports going from the given premise to the stated claim.
Which is to say, we want to support this idea:
stuff happened and a publisher made false claim --> this not unethical
On glancing at the choices, it's clear that they are all conditional statements of sorts, so a quick "ballpark" diagram of each choice might prove quite helpful.
(A) false claim is unethical --> reasonable for people to accept claim
(B) deriving gain from expense of others while making a false claim --> unethical
(C) false claim is unethical --> those who accept claim have more hardship than gain
(D) false claim is unethical --> possibility someone will act as if claim is true
(E) person must act as if claim were true in order to discover its falsity --> unethical
Whew! That may have been a bit of a slog due to the weird language, but note how everything has to do with matching some kind of situation with unethical/ethical.
Our argument ends with "NOT unethical." Therefore all choices that end with "unethical" can be eliminated right off the bat. There go (B) and (E).
Now, every other choices BEGINS with "unethical," which would match the contrapositive of our given. Notice how all of the remaining choices have more to do with the "stuff that happened" (ie the details above), so we're gonna have to check that stuff out, too.
(A) Let's contrapose it to better match our argument:
NOT reasonable for people to accept the claim --> NOT unethical.
Our original matches the right side perfectly. The question is, did the original argument say that is wasn't reasonable to accept the claim? Yes!! It said "everyone knows the book can't deliver..."
If everyone knows better, it's unreasonable for anyone to accept it. This is our answer.
(C) is very similar to (A). Let's contrapose it and then check out the left side. Does the original argument say whether people will have more hardship than gain? No, it doesn't say anything about this. Eliminate!
(D) is similar as well. Contrapose, and check out the left side. Did our argument say there was NO possibility of anyone ACTING as though the claim were true? Nope. It didn't say nobody would act on the book's advice -- it just said everybody knows better. Subtle but meaningful difference.
Hope that helps!