What is cross-domain connections?

Cross-domain connections is a concept in personal epistemology: Ideas that link separate areas of your knowledge graph are especially valuable.

Example: You study behavioral economics and notice that loss aversion maps precisely onto sunk cost reasoning in software engineering — teams keep investing in failing projects because abandoning them 'wastes' what they've already spent. That single connection between psychology and engineering is a bridge node. It doesn't belong to either domain. It belongs to the space between them, and it generates insights that neither domain produces alone.

This concept is part of Phase 18 (Knowledge Graphs) in the How to Think curriculum, which builds the epistemic infrastructure for knowledge graphs.