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  1.  4
    The Principle of Sufficient Reason and the Development of Formal Logic.Ni Dingfu - 1981 - Contemporary Chinese Thought 12 (3):16-28.
    Whether or not the principle of sufficient reason is a fundamental rule of formal logic is a question that merits serious discussion. In debates from as early as the 1960s, when discussing the subject and functions of formal logic, some comrades pointed out that formal logic cannot study just the forms of thought alone. One of their basic arguments was that "the principle of sufficient reason demands that the content of a premise must be true." In discussions concerning the truth (...)
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  2.  5
    The Development of the Law of Sufficient Reason and Formal Logic.Ni Dingfu - 1982 - Contemporary Chinese Thought 13 (4):66-78.
    Whether or not the law of sufficient reason is a basic law of formal logic is a question that merits in-depth discussion. Back in the 1960s, when discussion was held on the object and function of formal logic, some comrades were of the opinion that formal logic should not be confined to the study of the form of thinking. One of their arguments was "the law of sufficient reason requires that the contents of the premise be true." Similarly, in the (...)
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  3. The Principle of Sufficient Reason and the Development of Formal Logic.Ni Dingfu - 1976 - Contemporary Chinese Thought 7 (3):16-28.
    Whether or not the principle of sufficient reason is a fundamental rule of formal logic is a question that merits serious discussion. In debates from as early as the 1960s, when discussing the subject and functions of formal logic, some comrades pointed out that formal logic cannot study just the forms of thought alone. One of their basic arguments was that "the principle of sufficient reason demands that the content of a premise must be true." In discussions concerning the truth (...)
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