Thanks GMATMadeEasy! Makes me feel good to see that. I will try not to let you down...
I am not sure that I have specifically addressed logical opposition, in a posting.
@amaelle:
Basically, you negate the main verb of the sentence (so if there is more than one clause make sure it is the dominate clause of the sentence that you negate) so you would turn "He will take the bus instead of the car" becomes "He
may not take the bus instead of the car" the point of negating is really to say, "what if this is not true?" So just saying, "what if he does not take the bus" is a way to negate this statement.
If there is a quantifier you leave the verb alone and negate the quantifier. So if we were to say "All people eat meat." It would be "
Not all people eat meat." But once again it is really the doubt, so you are asking yourself - do I need this fact? So you can say "what if it was not true that all people eat meat?" Does this harm the argument?"
That is the essence of an assumption question. You are focused on what happens when you take away the answer choice. So the form that you use is not that crucial. You can just ask of each answer choice, "what if this is not true?"
For example, if the conclusion is "You have been accepted to business school" which of these is the assumption? A) You have scored 710 on the GMAT. B) You have been accepted to all of the schools to which you applied. C) Business schools are something that exist.
I know this is an extreme example, but do you see how it works. If we ask "what if A is not true?" Does this make the conclusion impossible or very unlikely? NO. "710" is too specific to be a good assumption here. What about if B is taken away? NO. This is much more than what is required. You do not have to have been accepted to all schools only one. Look at C, if this is taken away then you are saying what if business schools do not exist. That would harm the conclusion!!
Here are some links that GMATMadeEasy was talking about. Try some assumptions this way. By thinking what happens if I take this away.
https://www.beatthegmat.com/nuclear-powe ... 29-15.html
https://www.beatthegmat.com/an-odd-cr-fr ... 68008.html
https://www.beatthegmat.com/reduce-fatal ... 68915.html
https://www.beatthegmat.com/computers-as ... tml#302237
Good Luck!
