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Ornithologist: This bird species is widely thought to subsist

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Ornithologist: This bird species is widely thought to subsist  [#permalink]

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New post 13 Oct 2019, 16:12
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A
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D
E

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  45% (medium)

Question Stats:

61% (01:44) correct 39% (01:51) wrong based on 46 sessions

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Ornithologist: This bird species is widely thought to subsist primarily on vegetation, but my research shows that this belief is erroneous.While concealed in a well-camouflaged blind, I have observed hundreds of these birds every morning over a period of months, and I estimate that over half of what they ate consisted of insects and other animal food sources.

The reasoning in the ornithologist’s argument is most vulnerable to criticism on the grounds that the argument

(A) assumes, without providing justification, that the feeding behavior of the birds observed was not affected by the ornithologist’s act of observation
(B) fails to specify the nature of the animal food sources, other than insects, that were consumed by the birds
(C) adopts a widespread belief about the birds’ feeding habits without considering the evidence that led to the belief
(D) neglects the possibility that the birds have different patterns of food consumption during different parts of the day and night
(E) fails to consider the possibility that the birds’ diet has changed since the earlier belief about their diet was formed

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Ornithologist: This bird species is widely thought to subsist  [#permalink]

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New post 13 Oct 2019, 22:47
Akela wrote:
Ornithologist: This bird species is widely thought to subsist primarily on vegetation, but my research shows that this belief is erroneous.While concealed in a well-camouflaged blind, I have observed hundreds of these birds every morning over a period of months, and I estimate that over half of what they ate consisted of insects and other animal food sources.

The reasoning in the ornithologist’s argument is most vulnerable to criticism on the grounds that the argument

(A) assumes, without providing justification, that the feeding behavior of the birds observed was not affected by the ornithologist’s act of observation
(B) fails to specify the nature of the animal food sources, other than insects, that were consumed by the birds
(C) adopts a widespread belief about the birds’ feeding habits without considering the evidence that led to the belief
(D) neglects the possibility that the birds have different patterns of food consumption during different parts of the day and night
(E) fails to consider the possibility that the birds’ diet has changed since the earlier belief about their diet was formed


The conclusion is concerned with primary food of a concerned bird species. The flaw in the ornithologist argument is that he is basing it on his observation during morning hours and assuming the same eating pattern in the concerned bird species all through the day. Option D points out this flaw, and therefore is the correct answer.
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Ornithologist: This bird species is widely thought to subsist   [#permalink] 13 Oct 2019, 22:47
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Ornithologist: This bird species is widely thought to subsist

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