Principlev1PR-1349
Recognize that a single interruption in a deep work block…
Recognize that a single interruption in a deep work block costs the entire block, not just the duration of the interruption.
Why This Is a Principle
This derives from axioms about working memory limits (Working Memory Capacity Limit), attention residue (Task-switching generates attention residue that persists…), and switching costs (Task switching between different types of cognitive work…). The principle prescribes treating interruptions as block-destroyers rather than as additive costs, which changes how aggressively they must be prevented.