Logical analysis of terminological usage in speech act theory from the perspectives of set theory and mereology

抄録

Since the proposal by Austin (1962) and Searle (1969), Speech Act Theory has become established as an important theoretical framework in linguistics and pragmatics. In this theory, speech acts are classified into three types: locutionary acts, illocutionary acts, and perlocutionary acts. Specific linguistic acts such as requests, apologies, invitations, and expressions of gratitude are theoretically explained in various texts and dictionaries as belonging to illocutionary acts. However, there exists a discrepancy between the definition of terminology and its actual usage, causing serious confusion for beginning students. This research aims to contribute to beginning students by reorganizing the current state and patterns of terminological usage and examining the relationship between superordinate and subordinate concepts.