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编辑点评： 本系列是native speaker针对GRE写作issue部分的高频话题所写的范文。各位考生在备考时多看此类范文不仅能够拓宽语言能力，也能拓宽逻辑思维。希望对大家有帮助。 The speaker contends that discovery and progress are made only through mistakes. I strongly agree with this contention, for two reasons. First, it accords with our personal experiences. Secondly, history informs us that on a societal level trial-and-error provides the very foundation for discovery and true progress, in all realms of human endeavor. To begin with, the contention accords with our everyday experience as humans from early childhood through adulthood. As infants we learn how to walk by falling down again and again. As adolescents we discover our social niche, and develop self-confidence and assertiveness, only by way of the sorts of awkward social encounters that are part-and-parcel of adolescence. Through failed relationships not only do we discover who we are and are not compatible with, we also discover ourselves in the process. And, most of us find the career path that suits us only through trying jobs that don t. This same principle also applies on a societal level. Consider, for example, how we progress in our scientific knowledge. Our scientific method is essentially a call for progress through trial-and-error. Any new theory must be tested by empirical observation, and must withstand rigorous scientific scrutiny. Moreover, the history of theoretical science is essentially a history of trial-and-error. One modern example involves two contrary theories of physics: wave theory and quantum theory. During the last quarter-century scientists have been struggling to disprove one or the other--or to reconcile them. As it turns out, a new so-called string theory shows that the quantum and wave theories are mistakes in the sense that each one is inadequate to explain the behavior of all matter; yet both so-called mistakes were necessary for physics to advance, or progress, to this newer theory. | 
