A tired brain is more creative

To perform difficult, intricate tasks your mind needs to filter out all the distractions and work independently. This is preferable during the early hours of the day. However, after an exhausting day, your brain loses its ability to work intently and tends to pay attention to every stray thought. You get more insightful and innovative by grasping more than required from the surrounding. No doubt, so many inventions were made in bathtubs and showers, relaxing after a tedious day.