To be more accurate, you want to find a problem that people will pay (money, time, etc) for. He never tried to test that until it was too late. To be fair, th

To be more accurate, you want to find a problem that people will pay (money, time, etc) for. He never tried to test that until it was too late. To be fair, this is a very, very common failure mode and I can imagine most people reading this story can identify with it.