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Some say that an asteroid colliding with Earth was responsible for the

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Some say that an asteroid colliding with Earth was responsible for the  [#permalink]

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New post 15 Sep 2018, 10:11
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Some say that an asteroid colliding with Earth was responsible for the extinction of the dinosaurs. It is indeed likely that such a collision did occur and that it caused the death of the vast majority of dinosaurs. However, new evidence suggests that perhaps tens of thousands of dinosaurs lived far enough from the point of collision that they were not directly killed by the impact or by the drastic change in temperature when immense dust clouds created by the impact blocked the sun. Some other force must have been responsible for the death of these remaining dinosaurs.

If all the statements above regarding the possible asteroid collision with Earth are true, then what conclusion can be drawn from them?


A. No comparably catastrophic asteroid collision with Earth has occurred since the one that killed the vast majority of dinosaurs.

B. Some members of each dinosaur species were killed either directly or indirectly by the impact of the asteroid collision with Earth.

C. All the members of at least one dinosaur species were killed either directly or indirectly by the impact of the asteroid collision with Earth.

D. If the majority of dinosaurs were killed by an asteroid colliding with Earth, some dinosaurs lived at great distances from each other at the time of the collision.

E. It is possible to determine a close estimate of the number of dinosaurs that were killed, either directly or indirectly, by the asteroid collision with Earth.

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Re: Some say that an asteroid colliding with Earth was responsible for the  [#permalink]

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New post Updated on: 18 Sep 2018, 09:55
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Some say that an asteroid colliding with Earth was responsible for the extinction of the dinosaurs. It is indeed likely that such a collision did occur and that it caused the death of the vast majority of dinosaurs. <<<<However, new evidence suggests that perhaps tens of thousands of dinosaurs lived far enough from the point of collision that they were not directly killed by the impact or by the drastic change in temperature when immense dust clouds created by the impact blocked the sun. Some other force must have been responsible for the death of these remaining dinosaurs.>>>

If all the statements above regarding the possible asteroid collision with Earth are true, then what conclusion can be drawn from them?

A. No comparably catastrophic asteroid collision with Earth has occurred since the one that killed the vast majority of dinosaurs.
Explanation: The reason behind the extinction of remaining dinosaurs cannot be obtained from this choice. - Incorrect

B. Some members of each dinosaur species were killed either directly or indirectly by the impact of the asteroid collision with Earth.
Explanation: Indirectly killed?? But how? What is the force behind the death? - Incorrect

C. All the members of at least one dinosaur species were killed either directly or indirectly by the impact of the asteroid collision with Earth.
Explanation: Same as B

D. If the majority of dinosaurs were killed by an asteroid colliding with Earth, some dinosaurs lived at great distances from each other at the time of the collision.
Explanation: Here we go!!! Majority of them were killed because of the asteroid collision but others survived because they lived at a greater distance from each other when it happened.
Correct


E. It is possible to determine a close estimate of the number of dinosaurs that were killed, either directly or indirectly, by the asteroid collision with Earth.
Explanation: Estimate? Dinosaurs are dead to us, so we don't care about it!! :grin:

Thanks
Arjun

Originally posted by ArjunJag1328 on 15 Sep 2018, 23:10.
Last edited by ArjunJag1328 on 18 Sep 2018, 09:55, edited 1 time in total.
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Re: Some say that an asteroid colliding with Earth was responsible for the  [#permalink]

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New post 18 Sep 2018, 08:42
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Some say that an asteroid colliding with Earth was responsible for the extinction of the dinosaurs. It is indeed likely that such a collision did occur and that it caused the death of the vast majority of dinosaurs. However, new evidence suggests that perhaps tens of thousands of dinosaurs lived far enough from the point of collision that they were not directly killed by the impact or by the drastic change in temperature when immense dust clouds created by the impact blocked the sun. Some other force must have been responsible for the death of these remaining dinosaurs.

If all the statements above regarding the possible asteroid collision with Earth are true, then what conclusion can be drawn from them?


A. No comparably catastrophic asteroid collision with Earth has occurred since the one that killed the vast majority of dinosaurs.- nothing has been mentioned in the argument
B. Some members of each dinosaur species were killed either directly or indirectly by the impact of the asteroid collision with Earth.- dinosaurs were killed, but nothing has been mentioned about each species
C. All the members of at least one dinosaur species were killed either directly or indirectly by the impact of the asteroid collision with Earth.- dinosaurs were killed, but at least one species is extinct is nowhere mentioned.
D. If the majority of dinosaurs were killed by an asteroid colliding with Earth, some dinosaurs lived at great distances from each other at the time of the collision.- the first part of the sentence is clearly mentioned. and 2nd part can be inferred from the first part. In my opinion, this is not the best option but out of the remaining options, this one is better.
E. It is possible to determine a close estimate of the number of dinosaurs that were killed, either directly or indirectly, by the asteroid collision with Earth.- this option is nowhere mentioned in argument
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Re: Some say that an asteroid colliding with Earth was responsible for the  [#permalink]

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New post 25 Sep 2018, 03:30
If all the statements above regarding the possible asteroid collision with Earth are true, then what conclusion can be drawn from them?

A. No comparably catastrophic asteroid collision with Earth has occurred since the one that killed the vast majority of dinosaurs. Not necessarily true. Out of scope.

B. Some members of each dinosaur species were killed either directly or indirectly by the impact of the asteroid collision with Earth. each species? We do not know that. Out of scope.

C. All the members of at least one dinosaur species were killed either directly or indirectly by the impact of the asteroid collision with Earth. Again, no info about specific species in the premise. Out of scope.

D. If the majority of dinosaurs were killed by an asteroid colliding with Earth, some dinosaurs lived at great distances from each other at the time of the collision. Realize that the tone is similar to the premise. "If the majority..." no absolute or extreme language here. We'll hold on to it.

E. It is possible to determine a close estimate of the number of dinosaurs that were killed, either directly or indirectly, by the asteroid collision with Earth. I like the tone, but we do not know that we can come up with an estimate of the number of dinosaurs. Out of scope.

Answer: D
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Re: Some say that an asteroid colliding with Earth was responsible for the  [#permalink]

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New post 25 Sep 2018, 05:53
Can someone tell how to make the right choice in an inference question?

Thank you
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Re: Some say that an asteroid colliding with Earth was responsible for the  [#permalink]

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New post 25 Sep 2018, 07:33
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jorgetomas9 wrote:
Can someone tell how to make the right choice in an inference question?

Thank you


jorgetomas9 this is a kind of a general question, and is hard to answer quickly...
but I would summarise it like this: ask yourself - what else needs to be true in order for the statements given to be true? what are the logical conclusions of the information, which are not themselves written?
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Re: Some say that an asteroid colliding with Earth was responsible for the &nbs [#permalink] 25 Sep 2018, 07:33
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Some say that an asteroid colliding with Earth was responsible for the

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