IN an age of technology, there is bound to be increasing interest in testing and laboratory methods, so-called \u22scientific evidence.\u22 These techniques promise a number of advantages, especially for criminal investigations and trials, not the least of which is the elimination of human bias. A finger print identifies more objectively than an eye witness. Similarly, percentage of alcohol in the blood as an indicator of whether a man is \u22under the influence\u22 is less susceptible to distortion than the judgment of a policeman observing behavior in the station house. Techniques such as these can certainly be useful. Simply because a method claims to be \u22scientific,\u22 however, it should not be accepted uncritically
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