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编辑点评： GRE阅读的方法相信大家已经积累了很多了，本文就为大家提供一些GRE阅读的材料，大家来练一练，把平时学到的东西运用到实际中，也多多积累词汇和句子，提高自己的阅读能力。 每天做一些标准的GRE阅读练习，有助于大家在GRE考试的复习过程中不断地进行练习和总结。希望大家在进行GRE阅读练习时，充分运用平时所积累的知识，这样才能有效果。 Historically, a cornerstone of classical empiricism has been the notion that every true generalization must be confirmable by specific observations. In classical empiricism, the truth of All balls are red, for example, is assessed by inspecting balls; any observation of a non red ball refutes unequivocally the proposed generalization. For W. V. O. Quine, however, this constitutes an overly narrow conception of empiricism. All balls are red, he maintains, forms one strand within an entire web of statements ; individual observations can be referred only to this web as a whole. As new observations are collected, he explains, they must be integrated into the web. Problems occur only if a contradiction develops between a new observation, say, That ball is blue, and the preexisting statements. In that case, he argues, any statement or combination of statements can be altered to achieve the fundamental requirement, a system free of contradictions, even if, in some cases, the alteration consists of labeling the new observation a hallucination. | 
