people might normally overlook, because he is trained in observation. Second, he begins asking questions on the basis of what he has observed. Third, after intense observation and questioning, he starts putting the evidence together and interpreting what he has. Fourth, he compares and correlates, piecing together all the evidence he has collected to see how each fact relates to the others. Finally, he draws a conclusion and makes a decision on the basis of what he believes actually occurred and
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