Abnormal mind, social custom and many other factors attribute to this phenomenon.

社会风俗和不正常的心态等因素是造成这种现象蔓延原因。

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To a certain extent, the algorithm can resolve the attribute reduction problem of abnormal decision tables and extend application of rough set theory.

该算法在一定程度上能够解决非常规决策表的属性约简问题，进一步扩展了粗糙集理论的应用范围。

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