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Detecting traces of TNT. University of Florida researchers in the Department of Materials Science and Engineering have invented a technique to rapidly detect traces of TNT ( Today, Spring 2005). The method, which involves shining a laser light on a potentially contaminated object, provides instantaneous results and gives no false positives. In this application, a false positive would occur if the laser light detects traces of TNT when, in fact, no TNT is actually present on the object. Let A be the
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