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Umm... it may not catch all but it may catch most and 
that may be good enough or as good as it gets.

The Saturn V was triple redundant.  Pogo effects weren't 
well understood.   Lightning was.  In both cases, catastrophes 
were avoided.  In the first case, the system survived the 
pogo effect well-enough to be studied and handled.  In the 
second case, the systems could be reset in real time.

len


From: Uche Ogbuji [mailto:uche.ogbuji@f...]

Good point, especially re: my surprise that redundancy didn't save
Ariane, but again I'd say such catastrophic failures are beyond the
reach of most techniques, including static type checking.

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