What is note as knowledge node?

Note as knowledge node is a concept in personal epistemology: Your externalized thoughts are the raw material for a knowledge graph.

Example: You have 400 notes in Obsidian. Most sit in folders you chose months ago, siloed by project or topic. One note says 'sunk cost fallacy drives bad retention decisions.' Another, in a completely different folder, says 'customers who stay out of inertia churn eventually anyway.' A third reads 'switching costs are not the same as loyalty.' No folder system would put these together. But the moment you treat each note as a node and ask 'what relates to what,' the three form a cluster that reframes your entire churn analysis. The insight was always there. The graph structure is what makes it visible.

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