tough sc from gmat prep

[varun007]

The Immigration Service now has the discretionary power to keep families united even though all their members do not meet the five-year residency requirement.
(A) all their members do not meet the five-year residency requirement
(B) not all their members meet the five-year residency requirement
(C) all their members have not met the requirement for a five-year residency
(D) not all their members have resided for five years, a requirement
(E) all their members have not resided for five years, as required

OA IS B PLS CAN U EXPLAIN

pls explain in detail

[JonathanSchneider]

I have moved this post to the GMAT Prep Verbal section. Please check there for a response later on.

Note: please be careful which section you are posting to. It helps us to answer your questions more efficiently. Thanks!

[rohit21384]

The Immigration Service now has the discretionary power to keep families united even though all their members do not meet the five-year residency requirement.
(A) all their members do not meet the five-year residency requirement
(B) not all their members meet the five-year residency requirement
(C) all their members have not met the requirement for a five-year residency
(D) not all their members have resided for five years, a requirement
(E) all their members have not resided for five years, as required

OA IS B PLS CAN U EXPLAIN

pls explain in detail

why option B better than option A.

[anoo.anand]

Even though....indicates something opposite is required... therefore NOT ...is correct.

B is the answer...

[rohit21384]

Even though....indicates something opposite is required... therefore NOT ...is correct.

B is the answer...

(A) all their members do not meet the five-year residency requirement
(B) not all their members meet the five-year residency requirement
I am still not clear with the difference in A and B.
In my opinion the distinction is in the meaning between two.
1)option-1 says that no member meet the requirement.....( then why Immigration department will give them residency..somebody in the family should meet the criteria.The meaning in the option doesn't make sense.)
2) option 2- says that some of them meet the requirement while others not, so
there will be relaxation for others.

Am i write tutors ?

[RonPurewal]

Even though....indicates something opposite is required... therefore NOT ...is correct.

B is the answer...

(A) all their members do not meet the five-year residency requirement
(B) not all their members meet the five-year residency requirement
I am still not clear with the difference in A and B.
In my opinion the distinction is in the meaning between two.
1)option-1 says that no member meet the requirement.....( then why Immigration department will give them residency..somebody in the family should meet the criteria.The meaning in the option doesn't make sense.)
2) option 2- says that some of them meet the requirement while others not, so
there will be relaxation for others.

Am i write tutors ?

you're close.

the exact reason is that (a) is ambiguous. it could mean the same as (b); it could also mean the same as what you've written.
for this reason, DO NOT USE "BOTH" OR "ALL" WITH NEGATIVE STATEMENTS. (this is why words such as "neither" or "none" exist.)

nb: you should have written "right", not "write". "write" means to take a pen out and scribble on paper.

[sandeep.19+man]

Can someone explain why E is wrong.

Is it because:
All their members may not have resided for five years, as required - is the intended meaning?

Thanks
[editor: see the post directly above yours for the answer to this question.
please read the thread!]

[elevinty]

Even though....indicates something opposite is required... therefore NOT ...is correct.

B is the answer...

(A) all their members do not meet the five-year residency requirement
(B) not all their members meet the five-year residency requirement
I am still not clear with the difference in A and B.
In my opinion the distinction is in the meaning between two.
1)option-1 says that no member meet the requirement.....( then why Immigration department will give them residency..somebody in the family should meet the criteria.The meaning in the option doesn't make sense.)
2) option 2- says that some of them meet the requirement while others not, so
there will be relaxation for others.

Am i write tutors ?

you're close.

the exact reason is that (a) is ambiguous. it could mean the same as (b); it could also mean the same as what you've written.
for this reason, DO NOT USE "BOTH" OR "ALL" WITH NEGATIVE STATEMENTS. (this is why words such as "neither" or "none" exist.)

nb: you should have written "right", not "write". "write" means to take a pen out and scribble on paper.

Ron, according to your explanation even B is wrong????in B "All" is used with a negative statement

[salman30]

Hi Ron, can you please explain the above ? i am a bit confused like "elevinty" as well.

[RonPurewal]

Ron, according to your explanation even B is wrong????in B "All" is used with a negative statement

nope.

(b) contains "not all"; the statement itself is not negative. i.e., there's only a problem when you have "all" with a negative VERB.
i apologize if this wasn't clear the first time.

i.e.,
All of X are not Y --> ambiguous; unacceptable
we don't know whether this means "none of X are Y" or just "some X are not Y".

Not all X are Y --> unambiguous; this is ok
this just means that there is at least one X that is not Y.

[elevinty]

as usual great explanation
Ron you are the DUDE!

[mschwrtz]

Glad you liked it.

[750plus]

Even though....indicates something opposite is required... therefore NOT ...is correct.

B is the answer...

(A) all their members do not meet the five-year residency requirement
(B) not all their members meet the five-year residency requirement
I am still not clear with the difference in A and B.
In my opinion the distinction is in the meaning between two.
1)option-1 says that no member meet the requirement.....( then why Immigration department will give them residency..somebody in the family should meet the criteria.The meaning in the option doesn't make sense.)
2) option 2- says that some of them meet the requirement while others not, so
there will be relaxation for others.

Am i write tutors ?

you're close.

the exact reason is that (a) is ambiguous. it could mean the same as (b); it could also mean the same as what you've written.
for this reason, DO NOT USE "BOTH" OR "ALL" WITH NEGATIVE STATEMENTS. (this is why words such as "neither" or "none" exist.)

nb: you should have written "right", not "write". "write" means to take a pen out and scribble on paper.

Ron Sir,

I did not get the ambiguity explained in choice A. Please if you can explain again.

Thank You.

[RonPurewal]

if someone writes All of these people do not do X, then it is impossible to tell which of the following messages is intended:
1/ none of them do X
2/ it's false that all of them do X (i.e., at least one of them does not do X)

[RonPurewal]

this might be easier to understand if we look at an example for which there's a word that means 'not X' (so that we can take away the source of confusion).

consider: if you do not have hair, then you are bald.

if someone writes
All of these people do not have hair
then it is impossible to tell whether the intended meaning is
1/ all of them are bald,
2/ not all of them have hair (= at least one of them is bald).