http://www.schneier.com/crypto-gram-1005.html

Crypto-Gram Newsletter
May 15, 2010
by Bruce Schneier
Chief Security Technology Officer, BT

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Worst-Case Thinking

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Remember Defense Secretary Donald Rumsfeld’s quote? “Reports that say that something hasn’t happened are always interesting to me, because as we know, there are known knowns; there are things we know we know. We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns — the ones we don’t know we don’t know.” And this: “the absence of evidence is not evidence of absence.” Ignorance isn’t a cause for doubt; when you can fill that ignorance with imagination, it can be a call to action.

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“We don’t know what we don’t know”

In the dikw (i.e., data, information, knowledge, wisdom) meme the elements explode into: Data is the elemental atom of the paradigm. Information is data in context. Knowledge is actionable information. Wisdom is knowing the implications of knowledge.

Wisdom is that “don’t know what don’t know” area.

Where is the edge of the flat earth?

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