Question

Started by claire_crites · started 2019-05-27 16:13 · last activity 2022-01-26 19:25 · 5 replies

Why is the answer A instead of D? Thanks!

Replies

  1. Ravi · 2019-05-27 16:54

    @claire_crites, Happy to help. Let's take a look at (A) and (D). In looking at the argument in the stimulus, we know that it's valid. Kate usually buys guava juice on Wednesday. If she buys guava juice, she must get it at the local health food store. Therefore, she sometimes shops at the health food store on Wednesdays. Since Kate usually buys guava juice on Wednesdays, we know that she usually goes to the store on Wednesdays. In the answer choices, we need to find a valid argument that mirrors this argument's structure. (D) says, "Most teachers at the Culinary Institute are allowed to use the institute's main kitchen. Dinners at Cafe Delice are only prepared in that kitchen. So dinners at Cafe Delice must sometimes be prepared by Culinary Institute teachers." The problem with (D) is that it's invalid. Based on the premises, it's totally possible that dinners at Cafe Delice are never prepared by Culinary Institute teachers, so this is why (D) is out. (A) says, "Only teachers at the Culinary Institute are allowed to use the institute's main kitchen. Most dinners at Cafe Delice are prepared in that kitchen. So at least some dinners at Cafe Delice must be prepared by Culinary Institute teachers." With (A), we know that if teachers are allowed to use the main kitchen, then the individual has to be a teacher at the institute. We know that dinners at the cafe are often prepared in this kitchen. From this, we know that some of the dinners at the cafe have to be made by institute teachers. This is a valid argument that mirrors the structure of the one in the stimulus, so it's the correct answer choice. Does this make sense? Let us know if you have any more questions!
  2. kassidee · 2020-06-18 19:30

    the quantifier language in the stimulus is different than the one in A, so I don't get how based off of that this answer can be picked when it doesn't mirror the stimulus' argument structure?
  3. ari · 2020-10-18 01:08

    ^^^
  4. AneeshU · 2021-11-16 03:39

    If you reorder the sentences in A like I've shown below, it might correspond better with the answer you were expecting to see. I had this question as well^. Could someone please confirm? "Most dinners at Cafe Delice are prepared in that kitchen. Only teachers at the Culinary Institute are allowed to use the institute's main kitchen. So at least some dinners at Cafe Delice must be prepared by Culinary Institute teachers."
  5. Jay-Etter · 2022-01-26 19:25

    Hi @AneeshU, You're exactly right! For parallel reasoning questions, it is a common trap but the order of the sentences doesn't need to be exactly the same as long as the argument structure is the same and all of the premises and quantifiers match. That said, if we had two identical options except for the order of the sentences, we would choose the one that more closely matches. That scenario shouldn't really happen though.

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