Millions of points are made on the internet every day, and millions of those points are rebutted and counter-rebutted. Waste as much time as you like observing your arguments disappearing like a noodle into the world's largest Cup-O-Soup. If changing opinions were as easy as correcting logical errors, there would be no political parties and we would all be of one mind. People and their visceral feelings are not program code - they can't be logically debugged like a for loop.