b********n
发帖数: 38600 | 1 There are known knowns. These are things we know that we know. There are
known unknowns. That is to say, there are things that we know we don't know.
But there are also unknown unknowns. There are things we don't know we don'
t know. | W*****B
发帖数: 4796 | 2 拉姆斯菲尔德
：There are known knowns. These are things we know that we know. There are
：known unknowns. That is to say, there are things that we know we don't
know. But there are also unknown unknowns. There are things we don't
know we don't know.
：vhttps://www.youtube.com/v/GiPe1OiKQuk
：来到这世上，我就没打算活着回去！
【在 b********n 的大作中提到】
: There are known knowns. These are things we know that we know. There are
: known unknowns. That is to say, there are things that we know we don't know.
: But there are also unknown unknowns. There are things we don't know we don'
: t know.
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