As the name suggests, KR&R focuses on how reality as a whole might best be represented in an internal "mental model," and what operations on that model are needed in order to draw valid conclusions from known facts.
The NLP technology that focuses on units of language larger than a sentence is discourse analysis and management (DAM). At this level, the equivalent of a parser's search for the sentence's nouns and verbs is a discourse analyzer's quest for the topic of the conversation as a whole.