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Inspector: The only fingerprints on the premises are those of the owne

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Inspector: The only fingerprints on the premises are those of the owne  [#permalink]

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New post Updated on: 10 Feb 2019, 12:32
1
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00:00
A
B
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D
E

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  45% (medium)

Question Stats:

64% (01:54) correct 36% (02:04) wrong based on 145 sessions

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Inspector: The only fingerprints on the premises are those of the owner, Mr. Tannisch. Therefore, whoever now has his guest’s missing diamonds must have worn gloves.

Which one of the following exhibits a flaw in its reasoning most similar to that in the inspector’s reasoning?


(A) The campers at Big Lake Camp, all of whom became ill this afternoon, have eaten food only from the camp cafeteria. Therefore, the cause of the illness must not have been something they ate.

(B) The second prototype did not perform as well in inclement weather as did the first prototype. Hence, the production of the second prototype might have deviated from the design followed for the first.

(C) Each of the swimmers at this meet more often loses than wins. Therefore, it is unlikely that any of them will win.

(D) All of Marjorie’s cavities are on the left side of her mouth. Hence, she must chew more on the left side than on the right.

(E) All of these tomato plants are twice as big as they were last year. So if we grow peas, they will probably be twice as big as last year’s peas.

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Originally posted by patto on 10 Feb 2019, 12:21.
Last edited by Bunuel on 10 Feb 2019, 12:32, edited 1 time in total.
Renamed the topic and edited the question.
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Re: Inspector: The only fingerprints on the premises are those of the owne  [#permalink]

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New post 11 Feb 2019, 00:12
hi, please explain how to approach the correct answer. I thought it's D, though not very sure to reason.
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Re: Inspector: The only fingerprints on the premises are those of the owne  [#permalink]

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New post 11 Feb 2019, 04:17
The answer is A ,because in the question the officer comes directly to conclusion that someone else wearing gloves might have done the robbery even though there were finger prints of only owner available
Similarly in option A author comes to a conclusion that food they ate is not the cause of illness excluding the option that the very camp cafeteria food that entire staff ate could be the cause of illness(like officer excluding the option of owner could be the thief)

Remaining options doesn't contain flaw similar to the question

Thank you

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Re: Inspector: The only fingerprints on the premises are those of the owne  [#permalink]

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New post 11 Feb 2019, 11:22
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patto wrote:
Inspector: The only fingerprints on the premises are those of the owner, Mr. Tannisch. Therefore, whoever now has his guest’s missing diamonds must have worn gloves.

Which one of the following exhibits a flaw in its reasoning most similar to that in the inspector’s reasoning?


(A) The campers at Big Lake Camp, all of whom became ill this afternoon, have eaten food only from the camp cafeteria. Therefore, the cause of the illness must not have been something they ate.

(B) The second prototype did not perform as well in inclement weather as did the first prototype. Hence, the production of the second prototype might have deviated from the design followed for the first.

(C) Each of the swimmers at this meet more often loses than wins. Therefore, it is unlikely that any of them will win.

(D) All of Marjorie’s cavities are on the left side of her mouth. Hence, she must chew more on the left side than on the right.

(E) All of these tomato plants are twice as big as they were last year. So if we grow peas, they will probably be twice as big as last year’s peas.


In the question stem, we are told fingerprints belong to the owner hence robbery must have been done by a person wearing the gloves.
This implies that the reason/evidence presented in the first line cannot be held responsible and the line presents alternate evidence. There is no connection or a single thread of thought between the two halves.

Now we need to look for answer choices which follow the same pattern -> present one evidence and then present second evidence which tells us how the first piece of evidence is not valid.

A. The campers at Big Lake Camp, all of whom became ill this afternoon, have eaten food only from the camp cafeteria. Therefore, the cause of the illness must not have been something they ate.
--> This presents a similar pattern. We are told they became ill and had food only from the cafeteria. In the second half, we are told that there has to be another reason as they couldn't have taken ill after having food from the cafeteria.

B. The second prototype did not perform as well in inclement weather as did the first prototype. Hence, the production of the second prototype might have deviated from the design followed for the first.
--> Not even close as evidence presented in first half and second half are well connected. Hence incorrect.

C. Each of the swimmers at this meet more often loses than wins. Therefore, it is unlikely that any of them will win.
--> Again the first half and second half are connected. Hence incorrect.

D. All of Marjorie’s cavities are on the left side of her mouth. Hence, she must chew more on the left side than on the right.
--> This one sounds illogical. If she has cavities on the left side, then she should chew from the right side and not the left side. Hence incorrect.

E. All of these tomato plants are twice as big as they were last year. So if we grow peas, they will probably be twice as big as last year’s peas.
--> Again the first half and second half are well connected. Hence incorrect.
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Inspector: The only fingerprints on the premises are those of the owne  [#permalink]

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New post 11 Feb 2019, 13:48
The argument in the question assumes that Mr. Tannisch cannot be the culprit. Just because he is the owner does not mean that he could not have hidden it. We have to look for a similar argument that exonerates any individual or entity without giving any justification. Only A meets the criteria. It just ignores camp cafeteria as being the culprit.
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Re: Inspector: The only fingerprints on the premises are those of the owne  [#permalink]

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New post 04 Aug 2019, 10:28
eabhgoy wrote:
D. All of Marjorie’s cavities are on the left side of her mouth. Hence, she must chew more on the left side than on the right.
--> This one sounds illogical. If she has cavities on the left side, then she should chew from the right side and not the left side. Hence incorrect.


This option is logical because she damaged the side which was exposed to more pressure. She was not using the right side of her mouth when chewing, thus, had lower number of cavities there.
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Re: Inspector: The only fingerprints on the premises are those of the owne   [#permalink] 04 Aug 2019, 10:28
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