In linguistics, the topic (or theme) is informally what is being talked about, and the comment (rheme or focus) is what is being said about the topic. Although this general nature of topic-comment dichotomy is generally accepted, anything beyond that's a matter of great controversy. The distinction was probably first suggested by Henri Weil in 1844. Georg von der Gabelentz distinguished psychological subject (roughly topic) and psychological object (roughly focus). In the Prague school, the di… (More on Topic-comment)