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 \u201chere\u2019s how smart I am, please give me money,\u201d a Lessons Learned presentation tells a story of a journey of hard-won learning and discovery. For all the teams it\u2019s 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.