We just finished our 4th annual Hacking for Defense class at Stanford. At the end of each class we have each team give a Lessons Learned presentation. Unlike traditional demo days or Shark Tanks which are “here’s how smart I am, please give me money,” a Lessons Learned presentation tells a story of a journey of hard-won learning and discovery. For all the teams it’s a roller coaster narrative of what happens when you discover that everything you thought you knew was wrong and how they eventually got it right.