DS选择principle求助

xiangyu4255

基本的principle我都理解。
不过我的困惑是：
如果条件1）或者条件2）能解出答案，但是答案不止一个，那么这种情况下，算sufficient么？

根据我自己做题做下来的感觉，只要是确定的答案，即使多于一个也是sufficient.是么？

coffeeqoo

不算

xinxiangwei

No. That doesn't count as sufficient! Only when you can narrow it down to only one answer. (unless the question is asking if the results are positive and all the answers are indeed positive or negative, then in those cases,  they are sufficient)

coffeeqoo

比如 题目问 What is x? 如果答案时正负2 就不算sufficient

xinxiangwei

According to OG13, Chapter 6.2, Page 272
"NOTE: In data sufficiency problems that ask for the value of a quantity, the data given in the statement are sufficient only when it is possible to determine exactly one numerical value for the quantity."

There you go. If you are uncertain about the basic rules, just flip through OG.

xiangyu4255

谢谢大家！