2025年6月20日至22日，“第二届逻辑、伦理学与社会科学跨学科国际会议”（The Second International Conference of Bridges between Logic, Ethics and Social Sciences，简称BLESS 2025）在山西太原迎泽宾馆举行。BLESS致力于将形式化工具（逻辑和数学）应用于个体和群体行为的相关问题的研究，所涵盖的研究领域包括：逻辑、伦理学、社会科学以及相关的形式化工作。本届BLESS 2025会议由山西大学科学技术哲学研究中心、山西大学哲学学院和山西大学逻辑与智能科学研究院共同举办，来自英国帝国理工学院、美国新罕布什尔大学、波兰卢布林天主教大学、清华大学、浙江大学、中山大学、山东大学、四川大学等国内外高校的专家学者前来参会。会议工作语言为英文。

经前期投稿与专家盲审，哲社学院科学技术哲学专业硕士研究生谭骏鑫以第一作者身份受邀参会并作题为“Knowing On-Topic：A Reconsideration on Sensitivity, Safety, and Closure”的报告，该报告介绍了Francesco Berto于2022年提出的“主题敏感意向性模态”语义论，并在该语义框架下对主题性、认知封闭、知识的安全性条件和信念传递等概念内容进行了论述。

Knowing On-Topic：A Reconsideration on Sensitivity, Safety, and Closure

Junxin TAN and Hongguang WANG

Abstract. Closure qualifies us for extending our knowledge or belief by recognizing and accepting what follows from something that we have already held. As an intuitive principle, it has been argued that an advantage the safety account over the sensitivity account is that the safety account is compatible with epistemic closure. Inspired by some achievements that are related to the growing attention in philosophical logic on the role played by topic-preservation in reasoning, this paper for a significant refinement in our understanding of epistemic and doxastic closure by incorporating the notion of topicality through topic-sensitivity intentional modals (TSIMs) proposed by Berto (2022). The alignment of conditional belief TSIM with AGM postulates provides a stable ground for arguing that safe beliefs, when processed through topic-preserving inferences under believed implication, can yield further safe beliefs, which may offer a more reasonable model of how rational agents extend their cognitive states through reasoning. In a nutshell, it is crucial for us to reason on-topic.

Keywords. Closure; Topicality; Safety; Conditional Belief

文：谭骏鑫

审核：王洪光