Well, it surely was lacking in the evidence department.

However, it certainly squares with my experience. Heck, I was up at 430am this morning, standing in my garage and giving an impromptu lecture to my clothes dryer about the math behind Kalman filters and Dempster-Shafer theory, because I had some ideas in my brain burning to get out, and talk out loud imaginary lectures do that for me (YMMV). Kind of hard to get that kind of solitude and privacy in a workplace where you have to measure every 15 minutes of productivity, or work in a open work space, or, you get the idea.