A person in your life seems to have an opinion that is written in stone. You may feel that your perspective on the matter is the correct one, and so you see nothing wrong with arguing about it. But doesn't that make you just as inflexible, Sagittarius? If you can't agree, then you will have to agree to disagree! Anything less will only lead to an endless cycle of monologues, with no one getting anywhere. Doesn't that seem like a colossal waste of your time and energy?