The hardest and most intractable problem in the … system should do. How does one know that … that may occur that were simply not anticipated … For example, in the 1960 false alert [of the Ballistic Missile Early Warning System radar in Thule, Greenland], proving that the system met its specifications would not help … is thus a misnomer--a better term might be … [Smith, B.C. SIGCAS Newsl. 14.4:1-3, 18-26]
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