# Principle of compositionality | | In semantics, mathematical logic and related disciplines, the **Principle of compositionality** is the principle that the meaning of a complex expression is determined by the meanings of its constituent expressions and the rules used to combine them. The principle is also called Frege's principle, because Gottlob Frege is widely credited for the first modern formulation of it. However, the principle has never been explicitly stated by Frege, and arguably it was already assumed by George Boole decades before Frege's work. | |-|-| | | wikipedia:: [Principle of compositionality](https://en.wikipedia.org/wiki/Principle_of_compositionality) | contra [[Emergence]]?