In addition to the labor and materials used to make wine, the reputation of the vineyard where the grapes originate p...

Keith on September 30, 2019

Correct answer

Could you please explain why C is the correct answer, and not D? Thank you!

1 Reply

Irina on September 30, 2019

@ksosen13,

Let's look at the structure of the argument.
We are given the following premises:

Labor and materials determine the price of the wine.
Reputation of the vineyard determine the price of the wine.

And conclude that:
Therefore, an expensive wine is not always a good wine.

Let's look at (C) and (D):

(C) The reputation of the vineyard does not always indicate the quality of the wines.

If we negate this assumption - the reputation of the vineyard always indicates the quality, meaning better reputation -> higher price -> better quality, the conclusion will no longer makes sense as reputation will always indicate the quality. Thus, we can conclude that this is a necessary assumption for the argument to follow logically, only if there is not always a direct correlation between the reputation -> price- > quality, could we conclude that more expensive wine is not always a good quality wine.

(D) The reputation of the vineyard generally plays a greater role in determining the price than other factors.

This assumption has no impact on the conclusion, if we negate it, and the quality of the grapes or labor plays a greater role in determining the price, we could still conclude that more expensive wine is not always a good wine because the reputation would still play a role - even though a comparatively smaller one - in determining the price.