Structural stability is a principle of cognitive economy suggested by Dirk Geeraerts as a basic factor in prototype categorzation. According to this principle, a cognitive structure has to be stable enough to not change completely every single time it has to accommodate to new circumstances, so that can still classify new experiences in terms of stored encyclopedi knowledge. This principle should account for the ability to recognize patterns via categories despite the dynamicity of prototype categories.
- Geeraerts, Dirk (1997). Diachronic Prototype Semantics: a Contribution to Historical Lexicology. Oxford: Clarendon Press.