#23- At Southgate Mall, mattresses are sold only at Mattress

[Desperatenconfused]

I don’t really understand the difference between C and D. Because the stimulus said that at the mall mattresses sold are only at Mattress Madness, I thought it was parallel to the only food in Diane’s apartment is in her fridge, rather than all the food in the apartment is in the fridge. Can anyone explain this difference to me?

[Desperatenconfused]

I don’t really understand the difference between C and D. Because the stimulus said that at the mall mattresses sold are only at Mattress Madness, I thought it was parallel to the only food in Diane’s apartment is in her fridge, rather than all the food in the apartment is in the fridge. Can anyone explain this difference to me?

I realize it’s the last sentence for both answers that are different that makes C more parallel than D. However, can someone confirm there is/isnt a difference in the first sentence (only = all?)

[Luke Haqq]

Hi Desparatenconfused!

In the stimulus, we have the following reasoning:

Mattress @ Southgate Mall Mattress Madness 20 percent off

That is, if it is a mattress being sold at Southgate Mall, then it is being sold at Mattress Madness, in which case it is 20% off. We can infer that if it is a Mattress being sold at Southgate Mall, then it is 20% off.

Answer choice (C) parallels this reasoning:

Food @ Diane's apartment Refrigerator Purchased within past week

That is, if something is food within Diane's apartment, then it is in the refrigerator, in which case it was purchased within the past week. We can infer that if it is food within Diane's apartment, then it was purchased within the past week. This has the same structure as the stimulus.

Answer choice (D) would be diagrammed as follows:

Food @ Diane's apartment Refrigerator Purchased within past week

So the structure would be identical. However, the problem is the conclusion reached in (D): "Therefore, all the food she purchased within the past week is in her apartment." This doesn't necessarily follow from the diagram. Based on the diagram, we know that if it's food in her apartment, then it was purchased within the past week. But it's possible that she also purchased food in the past week that isn't in her apartment (e.g., perhaps she went out to eat).