dungdt2010 wrote:
Dear experts,
I have some doubts on this question.
Though I understand 100% why B can make the conclusion True. I believe if I negate B, the conclusion does not 100% collapse
negated B is: There are not as many pin-tipped etching tools as there are bladed etching tools.
So I have 1 example
etching
pin-tipped 1 1 engraving
bladed 99 97 engraving
2 not engraving
Then I related to the example in Powerscore CR
"For example, let us say that an argument requires the
assumption ???all dogs are intelligent.??? The correct answer could be that
statement, or even a subset statement such as ???all black dogs are intelligent???
or ???all large dogs are intelligent??? (black dogs and large dogs being subsets
of the overall group of dogs, of course). But, additional information would
rule out the answer, as in the following case: ???All dogs and cats are
intelligent.??? The additional information about cats is not part of the author???s
assumption, and would make the answer choice incorrect."
In the question and the example, the assumption both present "more conditions" necessary for the conclusion to be True.
This is why I am confused with this question. Please help
Note that this is a "sufficient assumption" question, not the regular "necessary assumption" question of GMAT.
The conclusion of the argument follows logically if which one of the following is assumed?
What will make the conclusion follow logically? (not what is necessary for the conclusion)
If some bladed tools are used for engraving and some are not while all pin tipped tools are used for engraving, when can we say that there are more tools used for engraving than not used for engraving?
If we know that there are as many pin tipped tools as bladed tools, then we know for sure that there are more tools for engraving.
If there are total 100 tools - pin tipped + bladed
When pin tipped are 50 and bladed are 50 and all pin tipped are used for engraving and some bladed are used for engraving then we can say logically that more tools are used for engraving than not used for engraving.
Do they need to be 50 - 50? No. But if they are, does the conclusion follow? Yes. This is what we are looking for.
This is really important to me: "Note that this is a "sufficient assumption" question, not the regular "necessary assumption" question of GMAT. "