Structure does not appear during smooth use. It appears during breakdown.
You won’t see the structure unless something goes wrong. It is revealed when action fails.
From the design philosophy reader
CHAPTER 26 UNDERSTANDING, ONTOLOGY, THROWNNESS AND READINESS-TO-HAND - Terry Winograd and Fernando Flores
https://www.bloomsbury.com/uk/design-philosophy-reader-9780857853493/
Failure reveals the real dependencies of the system.
