b. 1958
Nicholas Asher is a contemporary philosopher and formal semanticist working at the intersection of philosophy of language, linguistics, and logic. He is best known for developing Segmented Discourse Representation Theory (SDRT), a significant extension of Kamp's Discourse Representation Theory (DRT) that formally models discourse structure, coherence relations, and the semantics of multi-sentence texts. His research spans lexical semantics, implicature, anaphora, and the logical foundations of natural language interpretation.
Developed Segmented Discourse Representation Theory (SDRT), formalizing discourse coherence and rhetorical structure
Authored foundational works including 'Reference to Abstract Objects in Discourse' (1993) and 'Logics of Conversation' (2003)
Advanced the formal semantics of accessibility relations within Discourse Representation Theory
Contributed systematic accounts of lexical meaning in context, including coercion and type-shifting phenomena
Pioneered computational and logical treatments of anaphora resolution across discourse