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If the lessons of history teach us anything it is that nobody learns the lessons that history teaches us. |
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Dijkstra did not introduce errors systematically and with care. He did, by structuring his solutions using appropriate levels of abstraction, keep them out.
Compare the T.H.E. OS with Brooks' et al IBM BOS. Brooks' team created lots of debugging practice. 40,000 bugs and climbing when I read about it... all those years ago.
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