Principlev1
Route all captured material through a single inbox that is
Route all captured material through a single inbox that is processed to zero on a regular cadence, because multiple unprocessed inboxes consume working memory slots for tracking their existence independent of their contents.
Why This Is a Principle
Derives from Working Memory Capacity Limit (working memory holds 3-5 items), Open-Loop Cognitive Cost (Zeigarnik) (unresolved commitments consume working memory), and Human memory under stress and cognitive load is unreliable (memory under load is unreliable). The lesson argues that each inbox location consumes a working memory slot just for tracking, before considering contents.