合理性问题一直是哲学的核心问题，迄今仍然如是．但当合理性问题参照当代思想家，特别是参照哈贝马斯的思想而被大量讨论的，从伽达默尔解释学的维度对合理性的著述却为数甚少，为了弄清这种情形出现的原因，有人或许会推测是伽达默尔自己从未有任何文字明确讨论过合理的话题 The question of rationality has always been a core issue of philosophy and so far remains the case. However, when the issue of rationality has been heavily discussed in the light of contemporary thinkers, and especially in the light of Habermas’s thought, there have been very few reports on rationality from the perspective of Gadamer’s hermeneutic dimension in order to clarify the situation , One might speculate that Gadamer himself had never had any text explicitly discussing reasonable topics