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Both of Amy's brothers are not playing the piano.
Which of the following is not true?

A. Amy's brothers are not playing the piano.
B. Amy has two brothers.
C. One of Amy's brother is playing the piano.
D. One of Amy's brother is not playing the piano.

The asnwer is C, am I right?

thanks.

bmo
Comments  
C is the choice, but I would say, "neither of Amy's two brothers is playing the piano". The original sentence doesn't tell us how many brothers she has, by the way.
Thanks, but I thought "Both of Amy's brothers" tells us she has exactly two brothers. From American Heritage Dictionay:

PRONOUN:The one and the other: Both were candidates. We are both candidates. Both of us are candidates.


Please note "The one and the other" means there are two exactly.

bor-ming
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Personally, I can never make sense of sentences which have "all" or "both" or "every" in the subject position and a negated verb. They have just about all the ambiguity and muddle the English language is capable of at its worst! Why do people insist on composing such structures? (rhetorical question!) Given the ambiguity, there is no answer to the multiple-choice question.

All X are not Y = ???

No X is a Y? or Not all X are Y?

CJ
Hi guys,

Both of Amy's brothers are not playing the piano.
Which of the following is not true?

A. Amy's brothers are not playing the piano.
B. Amy has two brothers.
C. One of Amy's brother is playing the piano.
D. One of Amy's brother is not playing the piano.


It's late at night and this is tricky, but here goes.

A is true. Perhaps one is playing, perhaps neither.

B is true. She has 2 brothers, unless there is a special context, eg she has 7 brothers, and 2 came to the party and both of them ....

C may be true, but we don't know. One may be playing, or no-one.

D is like C. It may be true, but we don't know. One may be playing, or neither.

So, the answer may be C and D, but we don't know. So which one do we know for certain is not true? None of the above.

No doubt others will have other opinions?

Clive
Very, very clear, I got it this time. CalifJim, it is from a junior hight test question.

Thanks a lot.

bmo
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Gee, I didn't get it till I read Clive's post-- Jim's was too mathematical for me. Very good, BMO!
BMOThanks, but I thought "Both of Amy's brothers" tells us she has exactly two brothers.

You are absolutely correct! My oversight.