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Manager
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I went for D, but I guess E would be stronger to make John not unique. Thanks
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E seems more reasonable than D, because for John not to be unique amongst his friends only one needs to not be telling the truth (i.e. "Some" is more reasonable than the more extreme "Most"). . .so E.
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I don't fully understand the difference b/n some and most. Some could mean half, less than half or more than half most means definitely more than half. Am I right? And if that is the case how would one be able to tell the difference between the two choices? 
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mariyea wrote: I don't fully understand the difference b/n some and most. Some could mean half, less than half or more than half most means definitely more than half. Am I right? And if that is the case how would one be able to tell the difference between the two choices? Some means 'at least 1'. Most means 'greatest quantity'. e.g. He got the most votes. If there were 3 people, he could have had 40 votes. So it isn't necessarily more than half. Just 'any majority'. Most of his friends would imply more than 50% since there will be two groups only - his friends who are telling the truth and his friends who are not telling the truth. We can say that at least 1 of his friends is lying (so that he is not unique). There is no reason to say that more than 50% of his friends are lying. Though, ambiguous question according to GMAT standards. I wouldn't worry about it.
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vaivish1723 wrote: All of John’s friends say they know someone who has smoked 40 cigarettes a day for the past 40 years and yet who is really fit and well. John does not know anyone like that and it is quite certain that he is not unique among his friends in this respect. If the statements in the passage are true, then which one of the following must also be true? (A) Smokers often lie about how much they smoke. the question has nothing to do about smokers lying but more about John's friends(B) People often knowingly exaggerate without intending to lie. we can deduce this from the argument(C) All John’s friends know the same lifelong heavy smoker. no in fact this is counter to the stmt which mentions John is quite certain he is not unique among his friends in this respect(D) Most of John’s friends are not telling the truth. we don't know how many of his friends are telling the truth or not(E) Some of John’s friends are not telling the truth. correct at least one friend (which qualifies as some) is not telling the truthOa is Why cant c be OA?
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VeritasPrepKarishma wrote: mariyea wrote: I don't fully understand the difference b/n some and most. Some could mean half, less than half or more than half most means definitely more than half. Am I right? And if that is the case how would one be able to tell the difference between the two choices? Some means 'at least 1'. Most means 'greatest quantity'. e.g. He got the most votes. If there were 3 people, he could have had 40 votes. So it isn't necessarily more than half. Just 'any majority'. Most of his friends would imply more than 50% since there will be two groups only - his friends who are telling the truth and his friends who are not telling the truth. We can say that at least 1 of his friends is lying (so that he is not unique). There is no reason to say that more than 50% of his friends are lying. Though, ambiguous question according to GMAT standards. I wouldn't worry about it. That was very helpful Karishma! Thank you 
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'he is not unique among his friends in this respect.' this statement is the difference between D and E .D can not be inferred from this statement alone , 'most' of john's friends don't have to be different from john to make him 'not unique'. if only 1 friend is like him , than he is not unique .hence E
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In the group there are some more people apart from John who also don't know such a person. Thus E fits in perfectly.
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That was a toughie. I will go with E though. S1: ALL of John's friends know someone who smokes 40cigs a day and is fit. S2: John does not anyone like that AND is CERTAIN that he is not alone among his friends in that aspect. This implies that there are some friends who are lying. Otherwise John would not be CERTAIN that he is not alone.
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I chose E because at first All of John's friends know someone who smokes 40 cigs a day and so on. But John is NOT unique. Keyword is unique..meaning some of his friends are also in the same position as John. Since *some* of his friends are in the same position as John then that means *some of his friends are lying*
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+ 1 E
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Good One... Nice Explanation
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