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The school bus always stops at the railroad tracks. When the

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Carcass
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The school bus always stops at the railroad tracks. When the [#permalink] New post   24 Aug 2020, 02:08
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The school bus always stops at the railroad tracks. When the warning light is not flashing, it then proceeds directly across if the tracks are clear. However, when the warning light is not flashing and the tracks are not clear, the school bus, waits until they are clear and then proceeds immediately across them.


If the statements above are true and it is true that the school bus stops at the tracks and then does not proceed to cross them, which of the following must also be true?

(A) The warning light is flashing and the tracks are clear.
(B) The warning light is flashing and the tracks are not clear.
(C) The warning light is not flashing and the tracks are not clear.
(D) The warning light is flashing, or the tracks are not clear, or both.
(E) The warning light is not flashing, or the tracks are not clear, or both.

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ultracrepidarian8
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Re: The school bus always stops at the railroad tracks. When the [#permalink] New post   10 Dec 2020, 17:32
Carcass wrote:
The school bus always stops at the railroad tracks. When the warning light is not flashing, it then proceeds directly across if the tracks are clear. However, when the warning light is not flashing and the tracks are not clear, the school bus, waits until they are clear and then proceeds
immediately across them.

If the statements above are true and it is true that the school bus stops at the tracks and then does not proceed to cross them, which of the following must also be true?

(A) The warning light is flashing and the tracks are clear.
(B) The warning light is flashing and the tracks are not clear.
(C) The warning light is not flashing and the tracks are not clear.
(D) The warning light is flashing, or the tracks are not clear, or both.
(E) The warning light is not flashing, or the tracks are not clear, or both.


NO LIGHT + TRACK CLEAR = MOVES
NO LIGHT + TRACK N.CLEAR = D.MOVE

From here, all I could conclude was that when the track is not clear, the train does not move (based on no warning lights).

Why is the answer not "C"? Are we to assume that those conditions are the ONLY cases where the train would move and not move? How can we know for certain that the light does not have an effect on whether or not the train stops? Not to be facetious, but what if the light is on and the track is clear, the train also does not move? Is it not also possible, since we do not know the conditions of the warning light being on, that the opposite can happen? It might not sound too great but, at face value, there seems to be room for interpretation for the average skeptic. Please help!
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Re: The school bus always stops at the railroad tracks. When the [#permalink] New post   10 Dec 2020, 19:04
I think if you think about it a little, then the correct answer will be the answer C
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parthkulkarni998
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Re: The school bus always stops at the railroad tracks. When the [#permalink] New post   05 Jan 2022, 19:58
ultracrepidarian8 wrote:
Carcass wrote:
The school bus always stops at the railroad tracks. When the warning light is not flashing, it then proceeds directly across if the tracks are clear. However, when the warning light is not flashing and the tracks are not clear, the school bus, waits until they are clear and then proceeds
immediately across them.

If the statements above are true and it is true that the school bus stops at the tracks and then does not proceed to cross them, which of the following must also be true?

(A) The warning light is flashing and the tracks are clear.
(B) The warning light is flashing and the tracks are not clear.
(C) The warning light is not flashing and the tracks are not clear.
(D) The warning light is flashing, or the tracks are not clear, or both.
(E) The warning light is not flashing, or the tracks are not clear, or both.


NO LIGHT + TRACK CLEAR = MOVES
NO LIGHT + TRACK N.CLEAR = D.MOVE

From here, all I could conclude was that when the track is not clear, the train does not move (based on no warning lights).

Why is the answer not "C"? Are we to assume that those conditions are the ONLY cases where the train would move and not move? How can we know for certain that the light does not have an effect on whether or not the train stops? Not to be facetious, but what if the light is on and the track is clear, the train also does not move? Is it not also possible, since we do not know the conditions of the warning light being on, that the opposite can happen? It might not sound too great but, at face value, there seems to be room for interpretation for the average skeptic. Please help!




However, option D covers a more comprehensive scenario as compared to the case mentioned in option C
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volcanictempest78
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Re: The school bus always stops at the railroad tracks. When the [#permalink] New post   21 Apr 2022, 22:47
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Carcass wrote:
The school bus always stops at the railroad tracks. When the warning light is not flashing, it then proceeds directly across if the tracks are clear. However, when the warning light is not flashing and the tracks are not clear, the school bus, waits until they are clear and then proceeds immediately across them.


If the statements above are true and it is true that the school bus stops at the tracks and then does not proceed to cross them, which of the following must also be true?

(A) The warning light is flashing and the tracks are clear.
(B) The warning light is flashing and the tracks are not clear.
(C) The warning light is not flashing and the tracks are not clear.
(D) The warning light is flashing, or the tracks are not clear, or both.
(E) The warning light is not flashing, or the tracks are not clear, or both.



what we know- bus stops (a pause) at the tracks then proceeds to go if light is not flashing but if nothing else is there it DOES PROCEED - eliminate option C (it will wait for the road to be clear and it will for sure proceed )and Option E (it will wait but again will proceed)

out of the options B and D the most comprehensive of all situation is the option D
Option A we don't know how the driver is going to react, thru passage we can't know for sure - so eliminate
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