Maybe it’s that when we’re tired, both of our brain parts need to work together more effectively to accomplish the task, in a sense that the creative part is the one that drifts, and the analytical part is the one that tries to focus, keeps the schedule, pushes forward. The outcome would be a more creative, or dense/thoughtful work, but at cost of much more energy spent, as we manage this “inner struggle”. Hmm, interesting post, thank you!