But isn't the mental energy required to come up with this answer (and judge its rude/nonrude status) already a distraction? Once you've left the bubble, there i

But isn't the mental energy required to come up with this answer (and judge its rude/nonrude status) already a distraction? Once you've left the bubble, there is a cost to coming back into the zone. In my experience it's difficult to set the bubble boundaries. Some days I'm working on small tasks and wouldn't mind being interrupted, other days I need uninterrupted concentration. It's hard to communicate that with colleagues. Maybe there should be a general rule — mornings in the zone, then after lunch handle all tasks that require sync-up + training + selling.