Main Answer:
Carnap argued for the distinction between proper concepts (the ones that are explicitly defined) in his work "Proper and Improper Concepts" in 1927.
Explanation:
Carnap's exploration of proper and improper concepts in 1927 was a pivotal contribution to the philosophy of language. In this work, he emphasized the importance of explicit definitions for proper concepts. Proper concepts, according to Carnap, are those that can be precisely defined, providing a clear and unambiguous understanding. This distinction was crucial for Carnap's logical empiricism, as it laid the foundation for a rigorous and systematic approach to language and meaning.
Carnap's argument underscores the significance of precision in language and conceptualization. By focusing on proper concepts that can be explicitly defined, he sought to establish a framework that avoids ambiguity and ensures a solid foundation for logical analysis. This distinction between proper and improper concepts became a cornerstone in the development of logical positivism and the Vienna Circle.
In essence, Carnap's work highlights the need for clarity and explicitness in philosophical and scientific discourse. His ideas have had a lasting impact on the philosophy of language, influencing subsequent discussions on logical positivism and analytical philosophy.