Principlev1
Define explicit usefulness boundaries for each schema
Define explicit usefulness boundaries for each schema specifying where it stops working and what alternative framework to switch to at those boundaries.
Why This Is a Principle
Derives from Goals as Perceptual Filters (goals define relevance) and Schemas as Knowledge Organization Structures (schemas guide information processing). The principle prescribes explicit boundary definition so you know when a schema's organizing structure is no longer appropriate for current goals.