Sufficient & Necessary Questions - - Question 8

The only way that bookstores can profitably sell books at below-market prices is to get the books at a discount from ...

esmislova July 20, 2019

Logic chain

there is a lot going on in this question and I do not understand how to really answer Cannot Be True questions without a really clear logic chain diagram

Reply
Create a free account to read and take part in forum discussions.

Already have an account? log in

Ravi July 20, 2019

@esmislova,

Great question. You can think of cannot be true questions as "must be
false" questions. For this particular question, I would highly
recommend diagramming the stimulus.

The more you diagram, the easier it'll be for you to see what must be
false. If you're still having trouble seeing what must be false
without diagramming, then don't be scared to diagram, as it'll almost
certainly help.

Profitably sell - >discount (no discount - >not profitably sell)
no high volume - >no discount (discount - >high volume)
high volume - >cater to mass tastes or specialized market access (don't
cater to mass tastes and no specialized market access - >not high
volume)

In using both the original statements and the contrapositives, we see
that we can make a chain starting with profitably sell

Profitably sell - >discount - >high volume - >cater to mass tastes or
specialized market access

The correct answer choice will almost certainly come somewhere from this chain.

(C) says, "A bookstore that profitably sells books at below-market
prices gets discounts from publishers."

This is given to us in the first statement of the stimulus, so it must
be true. Thus, (C) is the correct answer choice.

Does this make sense? Let us know if you have any more questions!