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It is still too early to say whether the Pentagon's grand doctrine of fighting superior numbers with superior technology will ultimately prevail. It may yet be possible to foil the world's most sophisticated -- and expensive -- weapons with countermeasures, some of which are literally dirt cheap. They include burning smoke pots to deflect heat-seeking missiles, draping targets with pictures of bomb craters to discourage further attack, and hunkering down in caves and sand dunes to wait out the blitz. In the end, no electronic marvel is going to liberate Kuwait. That is a job that will probably fall to the ultimate biological weapon: the G.I.