能不能解释一下

问题如下：

Frank Knight called variability that cannot be quantified at all as "unknown unknowns."

选项：

A.

True

B.

False

解释：

False because Frank Knight sets out a fundamental classification of "known" versus "unknown" risk in his classic paper on risk. Donald Rumsfeld, former US Secretary of

Defense said that "T here are things we know that we know. T here are known unknowns .. . But there are also unknown unknowns".

中文解析：

这道题选B: False.

这道题是在考察识别风险的四个分类。

对那些知道却又无法准确计量的风险，FrankKnight将其归到“known unknowns”。而“unknown unknowns”是指那些不知道会发生，也不能计量的风险。