ABSTRACT
In theory, deception can always be detected, and in practice often detected, sometimes even easily. Of the forty-six types of detectives studied, all but one used the same general procedures to detect deception. All others used standard logical systems in combination with intuitive methods. The more successful detections seemed to be closely associated with intuitive methods, particularly so-called "indirect thinking". Effective analytical procedures provide a method that pinpoints the handful of existing procedures for detecting deception that have proved most successful in all forty-six specialties. It also suggests a couple of new procedures that show promise for military-political analysts. The evidence strongly suggests that most, possibly all, of these behaviors and mind-sets can be taught to a considerable degree, particularly as part of on-the-job training. The Law of Multiple Sensors was gradually evolved by R. V. Jones as a direct result of his early experimenting with practical jokes, specifically telephone hoaxes.
