SDCAR2010【逻辑入门】（十五）More on Negation

sdcar2010

Necessary assumption. Usenegation. I said these two sentences hundreds of times here. If you master thetechnique of negation, you should be able to solve the necessary assumptionproblems easily and pass GMAT with flying colors.

When you negate an answer, just negate it. Try not to turn it into itsopposite. Also, negate either the verb or the quantity, but not both.

To negate an if-thenstatement, negate ONLY the then clause.So "if A, then B" would become "if A, then not B"

Quantitites                                |  Negation
all, any,each, every, always          |  not all, some arenot
most,majority                             |  not most
usually,likely                                |  not usually, not likely
some,many, few                         |  none
sometimes,often, rarely                | never
only one,only once                     |  more than one, none (That's right. Not one = none or more thanone)
exactlytwo                                  |  one, more than two,none (similar to the reason listed above)
no, none                                     |  some


Verbs                                          | Negation

will                                                |  might, might not(Another case of paradox!)
can,could                                     |  cannot
there is,there are                          |  there is not, there are not

SDCAR2010【逻辑入门】（十四）Formal Logic (2)

SDCAR2010【逻辑入门】（十六）Practice questions on Principles

AlohaDJ

Thanks for the new chapter. Really leartned a lot from the series. Thanks a lot!
Anything new for future?

daisyの小夢想

Cool ~ 终于更新了。支持。

mia113

really helpful~!!!

mia113

I'm quite confused about the 'most, majority    |  not most'
In your previous post, you've mentioned that most meant more than half or all.
is that 'not most' means "less than half or none"?
Hope you can answer my question, thanks in advance.

sdcar2010

I'm quite confused about the 'most, majority    |  not most'
In your previous post, you've mentioned that most meant more than half or all.
is that 'not most' means "less than half or none"?
Hope you can answer my question, thanks in advance.

-- by 会员 mia113 (2011/8/19 10:16:52)

Yes, your understanding is correct.

sandychen168

大人，膜拜你啊~~~~期待下文，您太伟大了！！！！！！！！！！！

sandychen168

dear SDCAR~
I'm rather confused by this negation

Verbs                                             | Negation
will                                                  |  might, might not (Another case of paradox!)

Why the negtion of "will" is "might" and "might not" but not "will not".

Thank you!!!

happybeibei

亲爱的楼主~~还有更新么？！

sdcar2010

Here, we are talking about logical opposite vs. polar opposite. Will not is the polar opposite of will. "Will" mean definitely YES and inevitably YES! "Will not" means defintely NO and inevitably NO. However, in CR we are talking about LOGICAL opposite. Might and Might not means NOT definitely YES, not certain.

dear SDCAR~
I'm rather confused by this negation

Verbs                                             | Negation
will                                                  |  might, might not (Another case of paradox!)

Why the negtion of "will" is "might" and "might not" but not "will not".

Thank you!!!

-- by 会员 sandychen168 (2011/9/1 17:15:29)