- 著者
-
竹内 泉
- 出版者
- The Philosophy of Science Society, Japan
- 雑誌
- 科学哲学 (ISSN:02893428)
- 巻号頁・発行日
- vol.53, no.1, pp.25-41, 2020-09-30 (Released:2020-09-30)
- 参考文献数
- 10
In analysing logic of hearsay, the inconsistency of individual notions makes difficulty. Modal logic is suitable for analysing logic of hearsay. The most previous semantics of modal logic such as using possible worlds makes the formula x = y ⊃ □x = y valid. However, in logic of hearsay, it can happen that the quoting person recognises x = y although the quoted person recognises x ≠ y. As such, the formula x = y∧¬□x = y is satisfiable in logic of hearsay. In order to deal with this, this study propose a new semantics with belief structure.