Abstract nonsense is a term often used in mathematics, particularly in category theory, to describe a style of reasoning and discussion that emphasizes high-level concepts and structures rather than specific instances or computations. The phrase can sometimes carry a pejorative connotation, suggesting that a discussion is overly abstract or disconnected from concrete examples or applications. However, within mathematical discourse, it can also serve as a compliment, indicating that a topic deals with deep and fundamental ideas.
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