honey1 wrote:
hey can you plz help me with this question
how can option c be eliminated if some legal voter are professor then some legal voter will not be professor so what's wrong with it
i also want to ask i should focus on diagramming the conditions or on reasoning
Hello,
honey1. To answer your last question first, you may want to explore different ways of approaching the same question. Some people will swear by diagramming; others, like myself, write nothing down. But in either case, practice is essential to be able to spot the logical underpinnings of a passage. Consider choice (C) again:
Bunuel wrote:
(C) Some legal voters are not professors.
For this to be true
necessarily (i.e. to fit a must-be-true condition), we need to find information about voters who are definitely
not professors. What does the passage tell us? It is not until the final line that we get any information about brilliant (but not necessarily professorial) people.
Bunuel wrote:
Not surprisingly, there are no professors under the age of eighteen. And as is well known, no one under eighteen can vote legally. Finally some brilliant people are professors, some are legal voters, and some are under eighteen.
To summarize:
1) No professors are under 18.
2) No one under 18 can legally vote.
3.1)
Some brilliant people are professors. (Therefore, these brilliant people
must be 18+.)
3.2)
Some brilliant people are legal voters. (Therefore, these brilliant people
must be 18+.)
3.3)
Some brilliant people are under 18. (Therefore, this subset of brilliant people
must not be professors or legal voters.)
As you can see, we have no information about the voting population, in terms of the professions people hold. We cannot say for certain whether
any of these brilliant professors are the same people who comprise
legal voters. The term
some is too vague. But we can use that same understanding to qualify choice (E), as statement 3.3) shows above.
I hope that helps. I have done the best I can to try to trace my thought process.
- Andrew
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