It seems as though he has lost all the mental discipline he once had. Unable to concentrate for more than 45 minutes at a stretch, he scurries back and forth from computer to dining table - where his books lie open. His mind wanders while he strains his brain to solve the problems at hand. Yet every stray thought is chased down, hunted and a mental note is made to Google it. Every idea unrelated to his job is welcomed. At the computer he plays song after song - delaying the return to his books.
His productivity is low. Yet a part of him tries to explain this as nothing abnormal. The problem-solving process involves creativity and luck, both of which are non-linear.
Upstairs the children are scampering, like children do. Gleeful giggles are interspersed with heavy pounding on his ceiling. If only they would be quiet, then he would be able to study in peace. Then he would surely be able to solve all the problems.