I used to celebrate by pushing my physical limits at a pub; this year, I celebrated by pushing my cognitive limits in a terminal. A few years ago, I would have spent tonight at a rooftop lounge somewhere in Kolkata. Loud music, too many people, lots of drinks and food, and the kind of high-octane celebration where you get intoxicated far beyond reasonable limits. Birthdays meant midnight parties, groups, and groups meant noise, and noise meant you didn’t have to sit with your