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Most parents who are generous are good parents, but some

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Re: Most parents who are generous are good parents, but some [#permalink]

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New post 08 Sep 2011, 03:07
remember one rule: if a->b, then it not neccessarily b->a.

generous ---most---> good ----all---> good listener
self cent ---some---> parents |

D) some self centered are good, and all good are listeners. so some listeners must be self-centered. correct!!
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Re: Most parents who are generous are good parents, but some [#permalink]

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New post 07 Feb 2016, 11:46
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Most parents who are generous are good parents, but some [#permalink]

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New post 10 Jul 2017, 12:48
@Experts, could you please explain why C is incorrect and D is correct? I am extremely confused

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Re: Most parents who are generous are good parents, but some [#permalink]

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New post 13 Jul 2017, 19:45
csaluja wrote:
@Experts, could you please explain why C is incorrect and D is correct? I am extremely confused

"Yet all good parents share one characteristic: they are good listeners." - this suggests that being a good parent is SUFFICIENT for being a good listener. In other words, if this statement is true and we know someone is a good parent, we can infer that this person is probably also a good listener.

Notice that this does NOT necessarily imply that the opposite is true. In other words, just because a parent is a good listener, does not necessarily mean they are a good parent. In fact, even if the statements in the passage are all true, it is possible that MOST parents who are good listeners are actually BAD parents. Being a good listener might be necessary for being a good parent, but it is not necessarily sufficient.

Given that "most parents who are generous are good parents" and that being a good parent means you are probably a good listener, we can properly infer that most parents who are GENEROUS are also good listeners, but we CANNOT properly infer that most parents who are GOOD LISTENERS are also generous.

I hope that helps! And we have an article about the distinction between necessary vs. sufficient on its way, so keep an eye on our Topic of the Week series.
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Re: Most parents who are generous are good parents, but some   [#permalink] 13 Jul 2017, 19:45

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