---
tag: HBT1Q795AV
kind: concept
name: Selection
sources:
  - wikipedia: en:43839113@r1368323132
    locator: Glossary of Principia Mathematica, section Glossary
    note: adopted
    mention: wikipedia://en/43839113#9RWD
    sections: [Summary]
inventory: [49915CEQTY]
---

## Summary

A choice function: something that selects one element from each of a collection of classes.