The hierarchy of knowledge
Four levels from the deepest, most compressed truth to its most actionable form. Most enterprise content lives at level 3. The corpus holds all four.
Wisdom node
Irreducible recognized truth. "Control and aliveness are inversely proportional."
Principle
How the node applies in human life. "Genuine motivation requires both autonomy and felt significance."
Expression / Best practice
Domain-specific application in any of the 11 forms.
Technique
Discrete, immediately executable action.
Why this matters at runtime
Sasha doesn't just retrieve "the right wisdom node." It retrieves the node and the right expression level for this person, in this moment. A business analyst in the 45 minutes before a hard conversation needs the technique (level 10). The same person six months later, sitting with a shift in how they hold authority, may need the parable (level 3). The corpus makes that choice structurally, not by accident.
The bestseller on management found the technique. The corpus holds the node. These are not competing — they are different altitudes of the same mountain.