You arrived at your conclusion using the methods of formal logic.
你这个结论是按照形式逻辑的方法推论出来的.
《现代汉英综合大词典》
His analyses and interpretations of I Ching were also much of formal logic.
他对易之道德世界的分析与解释也是极其形式化的逻辑的.
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英英释义
Noun
1. any logical system that abstracts the form of statements away from their content in order to establish abstract criteria of consistency and validity