Introduction: the interplay of theory and observation (introspective and other data).

This article explores the relationship between theory and observation in scientific research, specifically in the field of linguistics. It discusses different perspectives on the role of observation and data in linguistic research, with a focus on generative syntax. The article emphasizes the importance of intuitive judgments and introspective data in this field, while also acknowledging the value of linguistic corpora and experimental methods. It concludes by presenting two papers that offer new perspectives on existing data in linguistics. The article is part of a collection of papers written to honor the 90th birthday of Mary A. Kato, a respected linguist. These papers cover various topics in linguistics, including language acquisition, syntax, semantics, and the use of judgment data in research. The authors present their findings based on extensive research and analysis of data from different sources, such as corpora and experimental studies. The papers provide valuable insights into the field of linguistics and highlight the significance of judgment data in linguistic research. [Extracted from the article]