AraT2 wrote:
I find C & D to be quite similar, could you please explain how to select the correct option here?
Thanks,
I'm quite sure this is an LSAT problem, so it doesn't have huge applicability to most GMAT CR, for what that's worth.
The difference in C and D is the certitude of the information.
We are told basically "no volleyballs are at work today because all volleyball players are sunburned, and no one at work is sunburned."
So 'none of group x' has 'quality y' because 'all of x has quality z' and 'no thing with y is also z.'
Start with right answer D:
(D) Everyone with an office on the second floor works directly for the president and, as a result, no one with a second floor office will take a July vacation because no one who works for the president will be able to take time off during July.
"No one on the second floor (group x) gets vacation in July (quality y), because everyone on second floor works with president (all x has quality z), and no one who works with the president gets a vacation in July (no thing with y is also z)."
That maps. C is close but with an important difference:
(C) Since the Donnely report was not finished on time, no one in John’s group could have been assigned to contribute to that report since everyone in John’s group has a reputation for getting assignments in on time.
"No one in John's group (group x) was assigned to D. report (quality y), because everyone in John's group has a REPUTATION for being on time (all x has a REPUTATION of quality z), and the D. report was not on time (~quality y was not with quality z)."
'Having a reputation' is the key phrase here. If everyone in John's group was NEVER late, or if we knew everyone in John's group got their reports in on time, this would more closely match the original stimulus. But 'having a reputation' for timeliness does not guarantee timeliness in this instance.