As a rule, software systems do not work well until they have been used, and have failed repeatedly, in real applications.
More Quotes from Dave Parnas:
Whenever anyone says, 'theoretically,' they really mean, 'not really.'Dave Parnas
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It is of first-class importance that our answer to the Riddle of the Sphinx should be in step with how we conduct our civilisation, and this should in turn be in step with the actual workings of living systems.
Gregory Bateson
Religious conflict can be the bloodiest and cruelest conflicts that turn people into fanatics.
William J. Brennan