Sometimes in your job, your normal way of doing things won't work. Before you spend an inordinate amount of time trying to shove a square block into a round hole, go to problem solving instead! When you realize the typical way of validating a new algorithm is not possible, it's time to stop trying to get your algorithm to be 100% perfect because there is no way to validate it without labeled data! Critical thinking time! Problem solving time! Problem 1: You realize that you do not have ground truth to validate a new motion detection algorithm you are developing. What do you do? Possible Answers: How much time would it take to get the ground truth? In my project, I could get some periods of motion by watching a video recording for all 160 hours of footage. This would take too much time! And even if I did watch all the footage, I may not be able to distinguish all periods of motion, meaning I still wouldn't have all of the ground truth. There were alternative ways o...