Now, motivational patterns are going to be similar among all espionage agents. That is to say: there will be certain types of motivation that are similar despite differing schools or opposed aims. You will study first how to separate this element for your analysis-in the beginning, through interrogation patterns that betray the inner orientation of the interrogators; secondly, by close observation of language-thought orientation of those under analysis. You will find it fairly simple to determine the root languages of your subjects, of course, both through voice inflection and speech pattern.
( Frank Herbert )
[ Dune ]
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