Logical grammar or rational grammar is a term used in the history and philosophy of linguistics to refer to certain linguistic and grammatical theories that were prominent until the early 19th century and later influenced 20th-century linguistic thought. These theories were developed by scholars and philosophers who sought to establish a logical and rational basis for understanding the relationship between reality, meaning, cognition, and language. Examples from the classical and modern period represent a realistic approach to linguistics, while accounts written during the Age of Enlightenment represent rationalism, focusing on human thought.[1][2]
Logical, rational or general grammar was the dominant approach to language until it was supplanted by romanticism.[3] Since then, there have been attempts to revive logical grammar. The idea is today at least partially represented by categorial grammar, formal semantics, and transcendental phenomenology,