Dean had no immediate motive to care about the AdWords problem. He worked in Search, which was a different area of the company, and he was more than busy navigating his own urgent problems. But at some point that Friday afternoon, Dean walked over to the kitchen to make a cappuccino and spotted Page’s note. He flipped through the attached pages—and as he did, a thought flickered through his mind, a hazy memory of a similar problem he’d encountered a while back.