# Popper's three worlds

> division of reality into World 1 (states and processes of the external world), World 2 (mental states and processes) and World 3 (products of thought considered as objects in their own right)

**Wikidata**: [Q1256921](https://www.wikidata.org/wiki/Q1256921)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Popper's_three_worlds)  
**Source**: https://4ort.xyz/entity/popper-s-three-worlds


## References

1. Freebase Data Dumps. 2013
2. YSO-Wikidata mapping project