In the paper, some remarks are made on several primary testing methods of causality, and the existent problems in these testing methods analyzed thoroughly.

文章对几种主要的因果关系检验方法进行了评析，并针对这些检验方法存在的问题作了深入分析。

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Methods of documentation and causality were used.

研究方法：文献资料法和因果分析法。

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It is pointed out that there are some restrict principles and concrete application methods in using presumption principle of causality.

同时认为适用因果关系推定原则应有原则、条件等限制，并配以具体的方法。

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This implies several crucial recognitions: that intuition and experience are not sufficient to make all decisions in a way that maximizes shareholder value, that non-experimental methods are not up to the task of determining causality with sufficient reliability to guide many actions, and that experiments can be applied in practice to enough business issues to justify the costs of the capability.

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