As Rumsfield said, there are known knowns and known unknowns;



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送交者: 岳麓山 于 2005-4-15, 00:19:32:

回答: 大可不必担心“逻辑是否有误”:Re张远山先生 由 mirror 于 2005-4-14, 22:22:20:

but there are also unknown knowns and unknown unknowns.
:-)




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