Scientist believe they have discovered the wreck of the USS : GMAT Critical Reasoning (CR)
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# Scientist believe they have discovered the wreck of the USS

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Scientist believe they have discovered the wreck of the USS [#permalink]

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29 Mar 2005, 11:49
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Scientist believe they have discovered the wreck of the USS Harvard, sunk by Japanese torpedoes during the Second World War. Their conclutions are drawn from underwater searches by mini-submarines of the area about 4 miles west of Midway Island in the Pacific Ocean during what started out as offshore oil platform accident procedures. There are some military historians that are skeptical about the scientists claim, on the basis that sophisticated sonar equipment has not identified the ship as, in deed the Harvard.

Which of teh following, if true, would weaken the historians arguments?

A) Thorough seaching by divers and bathscopes has not located the wreck.
B) Three other ships were sunk in this area during the Second World War.
C) The ship's last known position was 20 miles east of Midway.
D: The use of sonar only enables the user to identify the shape and dimension of a wreck.
E) It is not known whether the Harvard suffered much structural damager before beeing sunk.
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29 Mar 2005, 12:51
my call is E

A, B and C all support the statement. D also supports the statement as the historian said that "sonar cannot identify the ship" is almost the same as "sonar equipment only identify size and shape of the ship wreck".

E said that it is not know whether the ship suffered any structural damage, hence suggesting that whatever those historians have to rely on might be off the mark.
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29 Mar 2005, 13:38
I am caught between D and E.
It seems obviously it is D, but It would be too obvious.
Now D, kinda strengthens the historianâ€™s argument because it says sonar enables the user to identify the shape and dimension of a wreck. Well in that case, shape and dimension could be use to identify If the wreck is in fact the USS Harvard. I think D is tricky, the answer is E.
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29 Mar 2005, 13:39
patrickpui wrote:
my call is E

A, B and C all support the statement. D also supports the statement as the historian said that "sonar cannot identify the ship" is almost the same as "sonar equipment only identify size and shape of the ship wreck".

E said that it is not know whether the ship suffered any structural damage, hence suggesting that whatever those historians have to rely on might be off the mark.

i didn';t see this but yeah i get what you are saying about D. It in a way support the historians
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29 Mar 2005, 14:06
Fact: Wreck of Harvard is believed to be found at 4 miles west of Midway Island by minisubmarines.
Historians: This is suspicious since sonar has not identified the ship as Harvard.

A) Thorough seaching by divers and bathscopes has not located the wreck.
Supports historians, obviously.

B) Three other ships were sunk in this area during the Second World War.
How do we know if the wrecks are not from another ship? Supports historians.

C) The ship's last known position was 20 miles east of Midway.
This seems to support the historians. The last time it was seen it was 20 miles to the east. And now the wreckage is 4 miles to the west. How do we know if it is the right one?

D: The use of sonar only enables the user to identify the shape and dimension of a wreck.
Seems to be the answer to me. If sonar is not used to identify the exact ship then the fact that sonar cannot identify the exact ship may not mean the finding is suspicious.

E) It is not known whether the Harvard suffered much structural damager before beeing sunk.
I'm not sure why would this have anything to do with sonar being able to identify the ship. Seems out of scope for me.

So I'd have to choose D.
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29 Mar 2005, 14:16
HongHu wrote:
D: The use of sonar only enables the user to identify the shape and dimension of a wreck.
Seems to be the answer to me. If sonar is not used to identify the exact ship then the fact that sonar cannot identify the exact ship may not mean the finding is suspicious.

Exactly what I want to say. Thanks for the good explanation.
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29 Mar 2005, 14:21
HongHu wrote:

C) The ship's last known position was 20 miles east of Midway.
This seems to support the historians. The last time it was seen it was 20 miles to the east. And now the wreckage is 4 miles to the west. How do we know if it is the right one?

The Harvard's last known position was not close to the area where the wreck has been found may strenghen the historian's conclusion. It certainly does not weaken the argument. To weaken the historian's argument most effectively, conterevidence that shows that their method of investigation or study procedures results that are inconclusive must be brought, therefore D.
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Re: Scientist believe they have discovered the wreck of the USS [#permalink]

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10 Jan 2017, 06:39
The answer is indeed D. The confusion is always between D & E

The trick here is the word 'only'. Imagine that the historians and scientists are in a room.

Historians: "Hey! Sonar Test was not done hence the ship is not Harvard"

Scientist: Oh come on! Sonar ONLY tests the dimension. Even if you use Sonar you won't be able to know whether it was Harvard or something else!"
Re: Scientist believe they have discovered the wreck of the USS   [#permalink] 10 Jan 2017, 06:39
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