Categorial grammar is a formal approach to syntax in which linguistic expressions are assigned categories that specify their distribution and the types of expressions with which they can combine to form larger constituents ^[1][2]. In this framework, basic categories typically include noun phrases and sentences, while complex categories represent expressions that require particular arguments to yield another category. Syntactic composition is modeled through category-sensitive combination rules, linking grammatical structure with semantic interpretation and providing a formal account of how words and phrases combine into well-formed expressions ^[1][2].