Geoffrey K. Pullum is a prominent linguist and professor known for his work in the fields of syntax, semantics, and the philosophy of language. He has contributed significantly to the study of English grammar and has published numerous articles and books, including the well-known "The Cambridge Grammar of the English Language," co-authored with Rodney Huddleston. Pullum is also recognized for his critiques of linguistic theories and his advocacy for empirical research in linguistics. He has been involved in various academic discussions and debates, often emphasizing the importance of data-driven approaches in understanding language. His work has influenced both students and scholars in the field of linguistics.