Magruder’s Principle

1-42. Magruder’s principle states that it is generally easier to induce the deception target to maintain a preexisting belief than to deceive the deception target for the purpose of changing that belief. Magruder’s principle exploits target biases and the human tendency to confirm exiting beliefs. Magruder’s principle alludes to two paths. A path of the deceiver changing the belief of a target and a path of maintaining a present belief. The principle then advises the better of the two p...

 Multiple Forms of Surprise

1-46. A strong correlation exists between deception and surprise. The more forms of surprise built into the deception plan, the more likely it will overwhelm the target. These forms of surprise include size, activity, location, unit, time, equipment, intent, and style. One effect of surprise is the cry-wolf syndrome in which repeated false alarms have the potential to desensitize an enemy. A pattern of behavior lulls an opponent into a sense of normal behavior to allow a friendly action to oc...

 Jone's Dilemma

1-48. This principle is named after Reginald Victor Jones, a British professor heavily involved in solving science and technology intelligence challenges. In this deception, the target receives information through multiple means and methods, from many angles, throughout an operational environment. Deception generally becomes more difficult as the number of conduits available to the deception target to confirm the real situation increases. However, the greater the number of conduits that are d...