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I think C is a better choice. Please explain why is it incorrect.
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I think C is a better choice. Please explain why is it incorrect.
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I guess that C just is just a restatement of the second part of the argument, thus, it could be eliminated.

I cannot find anything else wrong in C.


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Type- Inference question

Correct answer - E

(C) If a personal relationship is supported by mutual respect and affinity, it will last a long time
This option is not correct because we don't know if these qualities guarantee a long-lasting relationship. Though we do know these qualities are required for a long-lasting relationship.
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PPhoenix77
Type- Inference question

Correct answer - E

(C) If a personal relationship is supported by mutual respect and affinity, it will last a long time
This option is not correct because we don't know if these qualities guarantee a long-lasting relationship. Though we do know these qualities are required for a long-lasting relationship.
But even E says that it "will" endure. It is confusing.

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E cannot be the correct answer choice. The stimulus states : "additionally require" that means it requires whatever stated above, + something extra.

IMO C since it paraphrase what the conditional relationship in the passage.

Tx,
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E cannot be the correct answer choice. The stimulus states : "additionally require" that means it requires whatever stated above, + something extra.

IMO C since it paraphrase what the conditional relationship in the passage.

Tx,
Yes, but the OA is E.

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srinjoy1990
E cannot be the correct answer choice. The stimulus states : "additionally require" that means it requires whatever stated above, + something extra.

IMO C since it paraphrase what the conditional relationship in the passage.

Tx,

e is incorrect; c is also incorrect.

for c: "if X then Y" does not mean "if Y then X"

e.g. > if it is raining, the ground will be wet DOES NOT MEAN if the ground is wet, it is raining

the passage states: IF a personal relationship is to endure (X), [THEN] it must be supported by the twin pillars of mutual respect and affinity (Y)

answer c states: IF a personal relationship is supported by mutual respect and affinity (Y), [THEN] it will last a long time (X)

wrong.

but also, this is an LSAT problem and NOT A GMAT PROBLEM, and, in fact, not at all like any problem that would ever appear on the GMAT.

i just asked ron about this, and he says, "not only are you wasting your time [practicing this kind of problem], you are compromising your ability to solve GMAT problems."
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Why A and C are incorrect ?

a is correct.

for why c is incorrect, see my response above.
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I picked B - given mutual respect needs to exist for trust to exist. Would that be the same as assuming mutual respect exists if trust is there? Just curious on how and why A. Thanks

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If you read the answer choices carefully, you would realize 'A' makes most sense because 'C' is kind of a trap game, or shell type... 'C' is simply the repetition of what is already stated. We are required to prove which of the following must 'also' be true. 'C' is true, the question goes one step further and ask for an additional answer, and hence 'A' is a better choice.
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'C' is simply the repetition of what is already stated

not exactly. the passage says that mutual respect and affinity are necessary, but not necessarily (lol) sufficient, conditions for a long-lasting personal relationship.

if X then Y

is not the same as

if Y then X

the passage says: if (you have a long-lasting personal relationship) then (it must be supported by mutual respect and affinity)

but (c) says: if (you have a personal relationship supported by mutual respect and affinity) then (it will be long-lasting)

similarly: if (you get into harvard business school) then (you must have a GMAT score of at least 500)

is not the same as: if (you have a GMAT score of at least 500) then (you will get into harvard business school)
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A) is correct as friendship also require natural affinity to be successful

B- wrong as nothing about presuppose part is mentioned in argument

C-wrong as it is not correctly saying the last sentence .it is saying last sentence of argument in reverse manner which we are not sure is true or not

D-wrong nothing about which is lasting more than other

E-wrong as it is extreme statement

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Lets solve this mathematically,

Long lasting → trust → mutual respect
A relationship that is long lasting implies it has trust (suppose it were not it will contradict the given statement in passage)
And a relationship with trust implies it has mutual respect.

Long lasting personal relationship → trust and natural affinity
Trust . → mutual respect

(A) A friendship supported solely by trust and mutual respect will not be long-lasting.

Friendships( long lasting) → trust, natural affinity
Natural affinity missing hence we can’t have long lasting friendship
Statement true.

(B) In the context of any professional relationship, mutual respect presupposes trust.




(C) If a personal relationship is supported by mutual respect and affinity, it will last a long time.

(D) Personal relationships, such as marriage or friendship, are longer-lasting than professional
relationships.

(E) Basing a marriage on a natural affinity will ensure that it will endure.

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respect - necessary -> trust
trust - necessary -> long lasting relationship(personal or proffessional)
affinity -necessary-> personal relationship
respect, affinity -necessary-> personal relationship

so only trust and respect means -> no affinity.
And as not A means not B for necessary conditions, no affinity means no personal relationship. Hence no friendship (So friendship will not be long lasting).

Please confirm if my thinking is correct. KarishmaB
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Hi,

You are on the right track but i would suggest some changes:
affinity + trust -> personal relationships {since the passage states "additionally require" meaning in addition to what is needed for a long-lasting relationship in general}
mutual respect + affinity + trust -> enduring personal relationships

You are correct to say that in A) since the wording mentions "solely" trust and mutual respect, it means only trust and respect. This means no affinity and hence since affinity is a must have condition for a relationship to endure, it will not be long-lasting.

Hope this helps!
arushi118
respect - necessary -> trust
trust - necessary -> long lasting relationship(personal or proffessional)
affinity -necessary-> personal relationship
respect, affinity -necessary-> personal relationship

so only trust and respect means -> no affinity.
And as not A means not B for necessary conditions, no affinity means no personal relationship. Hence no friendship (So friendship will not be long lasting).

Please confirm if my thinking is correct. KarishmaB
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arushi118
respect - necessary -> trust
trust - necessary -> long lasting relationship(personal or proffessional)
affinity -necessary-> personal relationship
respect, affinity -necessary-> personal relationship

so only trust and respect means -> no affinity.
And as not A means not B for necessary conditions, no affinity means no personal relationship. Hence no friendship (So friendship will not be long lasting).

Please confirm if my thinking is correct. KarishmaB

Yes, this is given. Personal relations need affinity and without it (as given by option (A)), they will not survive.
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