Alistair uses an altitude metaphor where sea level is in the middle, and everything else is either above or below sea level. A sea-level task is one we’d expect to complete before intentionally stopping to do something else. Did you write “Take a shower” in your list of tasks? That’s a sea-level task because you don’t get halfway through your shower and think, Man, this shower is dragging on. I think I’ll grab a cup of coffee and finish this shower later. Alistair calls these functional-level tasks and annotates them with a little ocean wave. But I’ll just call them tasks.
