Maintaining even a single mechanism like this in your mind, functionally, with all its eddies and cheeky exceptions, isn't without a strange kind of labor. For years, when I had to fly all over the place, bringing a new rulebook on the plane and trying to build that exquisite clock within my skull has been my primary form of entertainment. I assemble it in my mind until nothing I read surprises me. This process typically knocks me completely out.
