演绎推理 Deductive reasoning
（重定向自Deductive logic）
演绎推理（英语：Deductive Reasoning）在传统的亚里士多德逻辑中是「结论，可从叫做‘前提’的已知事实，‘必然地’得出的推理」。如果前提为真，则结论必然为真。这区别于溯因推理和归纳推理：它们的前提可以预测出高概率的结论，但是不确保结论为真。
“演绎推理”还可以定义为结论在普遍性上不大于前提的推理，或「结论在确定性上，同前提一样」的推理。
Deductive logic
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英语百科
Deductive reasoning 演绎推理
（重定向自Deductive logic）
Deductive reasoning, also deductive logic, logical deduction is the process of reasoning from one or more statements (premises) to reach a logically certain conclusion. It differs from inductive reasoning and abductive reasoning.
Deductive reasoning links premises with conclusions. If all premises are true, the terms are clear, and the rules of deductive logic are followed, then the conclusion reached is necessarily true.
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