Third is by accident, including by buggy code, and the permissiveness means it's easier for bugs to go unnoticed. See, e.g., https://news.ycombinator.com/item?i

Third is by accident, including by buggy code, and the permissiveness means it's easier for bugs to go unnoticed. See, e.g., https://news.ycombinator.com/item?id=48327115 https://news.ycombinator.com/item?id=48327115