According to Klein, humans have at least 9 grand Sources of Power. They include storytelling, metaphor, and intuition. They also include rationality (Kahneman’s more deliberate “System 2”), although in highly dynamic environments where time is short and information is imperfect, rationality quickly falls apart. And, over long stretches, rationality gets tired while intuition remains.

“our comments in rehearsal are there to help orient the player, not merely towards what is happening in the moment, the Kairos, but what that moment says about motion”