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关于必要条件假言判断的逻辑联结词,逻辑学界长期以来存有许多不同的看法。其中代表性的观点有如下两种: 一种观点认为“在汉语中,必要条件假言判断常用的联结词有‘只有……才……,、‘必须…才…’、‘不…就不’,‘除非…才…’、‘没有…就没有…’等等”。(中国人民大学《形式逻辑》(修订本)第95页)“‘不…,不…”、‘没有…,便没有…’,‘除非…,就不…’、‘只要不…就不…’在语言中表达必要条件假言判断的联结词。”(《学点逻辑》第55页)
There are many different opinions that the logic circle has long had on the logical connectives of the necessary conditions hypothetical judgment. There are two representative views: One view holds that “in Chinese, the necessary conditions for the hypothesis to judge commonly used conjunctions there is only ... ... ... ... 'must ... only ...', 'no ... no ',' Unless ... just ... ',' no ... no ... 'and so on. ” (Renmin University of China, “The Formal Logic” (Revised) p. 95) “No, no ... no no ... no ... no unless ... no ... no if no ... no ... 'In the language to express the necessary conditions for the hypothetical judge. (”Learning Logic" p. 55)