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10 Jun 2016, 07:34
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What am I missing here?
This is a "Must Be True question" without a conclusion ; hence it must be a Inference question.
The fact that it is a inference question is further bolstered by the the stimulus which is a collection of factual statements about mail delivery and time taken .
No conclusion is presented in the stimulus. So definitely an Inference question.
The answer to an Inference question is always a Re-packaged Premise. (According to Powerscore LSAT teachers, whom I regard in high esteem)
So the premises are
Premise 1) Nearly all correct mail takes 2 days ("Nearly all" means "not all" or at least one mail takes more than 2 days )
Premise 2) Correct mails takes more than 2 days when it is damaged in transit
Premise 3) However most mail arrives in 3 days or more, after being send.
Conclusion :- NOT PRESENTED IN THE STIMULUS
How can answer D be correct "A large proportion of mail is incorrectly addressed"
It certainly look like an unstated premise. Isn't an understated premise also called an assumption ?
If we move forward with the logic and complete the breakdown :-
Premise 1) Nearly all correct mail takes 2 days ("Nearly all" means "not all" or at least one mail takes more than 2 days )
Premise 2) Correct mails takes more than 2 days when it is damaged in transit
Premise 3) Incorrect mail takes 3 or more days to arrive. (ASSUMPTIONS)
Premise 4) However most mail arrives in 3 days or more, after being send.
Conclusion :- Therefore we can conclude, a majority of mail is wrongly addressed.
Nothing explicit is said about incorrectly addressed mail in the question stem.
So we cannot bring new information to answer the question ?
option D is new information
So again, What am I missing ????
AN EXPLAINATON WOULD BE MUCH APPRECIATED
This is a "Must Be True question" without a conclusion ; hence it must be a Inference question.
The fact that it is a inference question is further bolstered by the the stimulus which is a collection of factual statements about mail delivery and time taken .
No conclusion is presented in the stimulus. So definitely an Inference question.
The answer to an Inference question is always a Re-packaged Premise. (According to Powerscore LSAT teachers, whom I regard in high esteem)
So the premises are
Premise 1) Nearly all correct mail takes 2 days ("Nearly all" means "not all" or at least one mail takes more than 2 days )
Premise 2) Correct mails takes more than 2 days when it is damaged in transit
Premise 3) However most mail arrives in 3 days or more, after being send.
Conclusion :- NOT PRESENTED IN THE STIMULUS
How can answer D be correct "A large proportion of mail is incorrectly addressed"
It certainly look like an unstated premise. Isn't an understated premise also called an assumption ?
If we move forward with the logic and complete the breakdown :-
Premise 1) Nearly all correct mail takes 2 days ("Nearly all" means "not all" or at least one mail takes more than 2 days )
Premise 2) Correct mails takes more than 2 days when it is damaged in transit
Premise 3) Incorrect mail takes 3 or more days to arrive. (ASSUMPTIONS)
Premise 4) However most mail arrives in 3 days or more, after being send.
Conclusion :- Therefore we can conclude, a majority of mail is wrongly addressed.
Nothing explicit is said about incorrectly addressed mail in the question stem.
So we cannot bring new information to answer the question ?
option D is new information
So again, What am I missing ????
AN EXPLAINATON WOULD BE MUCH APPRECIATED
DeepikaV
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20 Aug 2016, 18:22
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hello,
if we consider total mail be 100( <2 days & >3 days =100) then ' most mail arrives 3 or more business days after being sent" with number= 51( as most can be 51-100) and
few mails arrive within 2 business days= 49 ( few range is 1-49). so, mails that arrive within 2 business days are correctly addressed without damage(total 49) and mails that arrive 3 or more days can be correctly addressed with damage and not correctly addressed( 50 can be not correctly addressed and one can be correctly addressed with damage or viceversa) . so, we cannot conclude that large proportion can be incorrectly addressed(D)
please explain if my logic is wrong. i have selected answer as C
if we consider total mail be 100( <2 days & >3 days =100) then ' most mail arrives 3 or more business days after being sent" with number= 51( as most can be 51-100) and
few mails arrive within 2 business days= 49 ( few range is 1-49). so, mails that arrive within 2 business days are correctly addressed without damage(total 49) and mails that arrive 3 or more days can be correctly addressed with damage and not correctly addressed( 50 can be not correctly addressed and one can be correctly addressed with damage or viceversa) . so, we cannot conclude that large proportion can be incorrectly addressed(D)
please explain if my logic is wrong. i have selected answer as C
21 Aug 2016, 15:48
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DeepikaV
Dear DeepikaV,
I'm happy to respond.
First of all, notice that this is a "must be true" question. We can construct scenarios in which (C) is true, but we also can construct scenarios in which (C) is false. That's why (C) doesn't work.
Now, you have propose to have constructed an argument that disproves (D), but think about it. Here is (D):
(D) A large proportion of mail is incorrectly addressed.
Your symbolic representation is a bit unclear, so I will translate what you say into clear symbols.
P = correctly addressed mail
Within this category,
P1 = correctly addressed, undamaged = arrives in two days or less
P2 = correctly addressed, damaged = arrives later
Notice that "nearly all" of P is P1, so P2 is very small.
Q = incorrectly addressed = arrives later
Let's say P = 51%, with P1 = 49% and P2 = 2%. Even this makes P2 bigger than the words seem to suggest, because P1 is supposed to be "nearly all" of P. That would leave us with Q = 49%. Thus, a majority (P2 + Q - 51%) would arrive late.
The trouble is, (D) does not claim that Q is a majority, but only a large proportion. A third, 1/3 of the population, is a large proportion, especially for something that is a clear mistake. Thus, 49% would definitely be a large proportion.
If 10% of car trips resulted in accidents, that would be huge proportion. If 10% of all air flights resulted in crashes, that would be a gigantic proportion. If 5% of people who underwent surgery died, that would a gargantuan proportion. Those are more extreme cases. If 1/3 of the words that a person wrote were misspelled, that would be a large proportion. If a certain dishwasher broke 1/3 of the dishes he washed, that would be a huge proportion. If a certain person, after tying his shoes, found that his laces soon after needed to be retied 1/3 of the time, that would be a large proportion. Those are more ordinary scenarios.
Much in the same way, every individual and every business that sends mail wants to address that mail correctly. If even 1/3 of them are not addressing them correctly, that is a very large failure rate on what should be a simple task. Thus, 49% is a large proportion.
Does this make sense?
Mike
