If a wig has any handmade components, it is more expensive than one with none. Similarly, a made–to–measure wig range...

shunhe on April 17, 2020

Hi @Maria-Marin,

Thanks for the question! This one has a lot of parts to it, so let’s take a look at what the stimulus is telling us. I’ll diagram it out:

WHM = wig has handmade components
ME = more expensive
MTMW = made to measure wig
RME = ranges from medium-priced to expensive
HF = handmade foundations
WWH = wigs with human fair
DC = should be dry cleaned

WHM —> ME
MTMW —> RME
~WHH —> ~HF (or, less confusing, HF —> WHH)
WHH —> DC
Conclusion: MTMW —> DC?
OK, so now let’s take a look at the correct answer to see why it works. (A) is right, because (A) gives us:

RME —> HF

And then we can conclude

RME —> HF —> WHH —> DC

Which means that

MTMW —> RME —> HF —> WHH —> DC

or

MTMW —> DC

which is what the conclusion is.

Now let’s take (C). (C) gives us that a wig with handmade components should be dry-cleaned. The problem with (C) is that it doesn’t give a link between a wig having hand-made components and anything else, such as being made-to-measure, and so (C) alone won’t justify the author’s conclusion. Having hand-made components needs to be linked to other parts of the stimulus, and that doesn’t happen.

Hope this helps. Feel free to ask any further questions that you might have.