# A new computer system will not significantly increase an organization's efficiency unless the computer system require...

Ryan on September 17, 2019

Why is A correct? Why is D incorrect?

Thanks

5 Replies

Julie on September 18, 2019

I think the key here is to note "new" and "existing" in the stimulus. If there's a new, more productive way of working, then there will be in increase in efficiency (NMPWW -> IE). But since the computer system is is fitting the existing way of work (~NMPWW), then it would have to be the case that there is not an increase in efficiency (~IE, answer choice A).

I read "most logically completes the argument" as a statement that would make the contrapositive statement " ____ -> ~NMPWW" true. Since the contrapositive of the S&N in the first sentence would be "~IE -> ~NMPWW", I think that would justify why (A) is correct.

Shunhe on December 22, 2019

@Ryan-Mahabir and @Julie-V,

Here, the stimulus is actually telling us something else: if a new system doesn't force employees to adopt new/better ways of working, then it won't significantly increase efficiency. (if ~FEANWW, then ~SIE)

We know that the new system will fit the existing ways of working. In other words, it won't force employees to adopt new/better ways of working. We can see that A results from our conditional logic. Hope this helps!

on January 9, 2020

Is "appreciable" the same as "significant"?

on November 18 at 09:03PM

Hello, I see written in the stimulus explanation that it starts with the contrapositive of the first conditionals correct? Or am I not reducing the unless statement correctly? Because I know that "unless" introduces a necessary, and then the sufficient is negated which would be
New computer increase -> computer system adopt new, more productive ways of working.
So am I correct in reading that the explanation in the stimulus explanation is of the contrapositive?

Ravi on February 8 at 12:19PM

@Lisam, you'd diagram the first sentence like this:

doesn't require organizations employees to adopt new, more productive ways of working-->will not significantly increase an organization's efficiency

We know that the Ministry of Transportation is having a new computer system built to fit the ministry's existing ways of working, so the sufficient condition of our diagram is met. From this, we can conclude that the new system will not significantly increase the Ministry's efficiency. It sounds like you just wrote down the contrapositive, which is totally fine!