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Modern navigation systems, which are found in most of

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Modern navigation systems, which are found in most of [#permalink] New post 17 Mar 2004, 21:56
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A
B
C
D
E

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1. Modern navigation systems, which are found in most of todayтАЩs commercial aircraft, are made with low-power circuitry, which is more susceptible to interference than the vacuum-tube circuitry found in older planes. During landing, navigation systems receive radio signals from the airport to guide the plane to the runway. Recently, one plane with low-power circuitry veered off course during landing, its dials dimming, when a passenger turned on a laptop computer. Clearly, modern aircraft navigation systems are being put at risk by the electronic devices that passengers carry on board, such as cassette players and laptop computers.The two portions in boldface play which of the following roles?


(A) The first is a principle that the argument relies on and the second is a conclusion that can be drawn from the first.
(B) The first is a fact that argument relies on and the second is a conclusion that must be drawn from this argument.
┬й The first acknowledges a consideration that supports that main position; the second is that conclusion.
(D) The first is an evidence that supports the conclusion, the second is that conclusion.
(E) The first is a principle that is necessary for this argument, the second is a conclusion that could be drawn from this argument

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 [#permalink] New post 18 Mar 2004, 05:34
what if the first bold face statement were

Recently, one plane with low-power circuitry veered off course during landing, its dials dimming, when a passenger turned on a laptop computer

what would be the answer?

Last edited by anandnk on 18 Mar 2004, 05:34, edited 1 time in total.
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 [#permalink] New post 18 Mar 2004, 05:34
What about E ....Isnt it a principle andd we can conclude from it...It wa s between A and E....I am leaning towards E...
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 [#permalink] New post 18 Mar 2004, 05:36
i don't know!! :lol: :lol: :lol:






(b) looks nice by poe (process of elimination)...
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 [#permalink] New post 18 Mar 2004, 13:29
I would go for B....the keyword here is 'fact'...it just tilts the balance in B's favor.

Vivek.

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 [#permalink] New post 18 Mar 2004, 13:40
B for me. Vivek pointed it out, "fact" is the key word and the "fact" is: navigation systems receive radio signals from the..
Now, base on that "fact: modern aircraft navigation systems are being put at risk by the electronic devices that passengers carry on board, such as cassette players and laptop computers

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 [#permalink] New post 18 Mar 2004, 14:12
Geethu wrote:
Why not D ??

An evidence would be something that directly support the conclusion. An example of an evidence in this case would be that passengers do indeed carry on-board electronic devices such as cassette players and laptop computers.

Only thing given is the fact that the above devices could disturb radio signals upon landing... and therefore the conclusion that those devices put airplanes at risk

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 [#permalink] New post 18 Mar 2004, 14:29
I got it. Thanks paul.

It doesn't directly help in concluding.
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Another varient of the same CR para ... [#permalink] New post 18 Mar 2004, 21:26
Modern navigation systems, which are found
in most of todayтАЩs commercial aircraft, are
made with low-power circuitry, which is
more susceptible to interference than the
vacuum-tube circuitry found in older planes.
During landing, navigation systems receive
radio signals from the airport to guide the
plane to the runway. Recently, one plane with
low-power circuitry veered off course during
landing, its dials dimming, when a passenger
turned on a laptop computer. Clearly, modern
aircraft navigation systems are being put at
risk by the electronic devices that passengers
carry on board, such as cassette players and
laptop computers.

Which one of the following, if true, LEAST
strengthens the argument above?

(A) After the laptop computer was turned off,
the plane regained course and its
navigation instruments and dials
returned to normal.

(B) When in use all electronic devices emit
electromagnetic radiation, which is
known to interfere with circuitry.

(C) No problems with navigational
equipment or instrument dials have been
reported on flights with no passenger-
owned electronic devices on board.

(D) Significant electromagnetic radiation
from portable electronic devices can
travel up to eight meters, and some
passenger seats on modern aircraft are
located within four meters of the
navigation systems.

(E) Planes were first equipped with
low-power circuitry at about the same
time portable electronic devices became
popular.
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 [#permalink] New post 19 Mar 2004, 22:20
vivek_dj wrote:
I would go for B....the keyword here is 'fact'...it just tilts the balance in B's favor.

Vivek.


Yes vivek and Paul, You are correct.
Answer is "B"

Nice discussion buddies. The rationale is awesome.

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 [#permalink] New post 01 May 2004, 10:16
The fact that everybody is ignoring when picking B is that the conclusion is that the NAVIGATION SYSTEMS are at risk, while the fact stated refers to the role of the navigation systems and thus relates to the airplane it self and not to the navigation systems, thus B seems to be out of scope
  [#permalink] 01 May 2004, 10:16
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