Since argument is a process of people trying to agree, agreement is subjective because it's based on an individual's acceptance of evidence and reasoning, regardless of objective ground truth.
That also means an argument can't be separated from its context. An argument will be defined by the relationship between speaker, audience, and the world around them.
But we'll talk about the social side of argument in a different lesson! For this lesson, the goal is to learn about some of the types of arguments we have with each other, and ourselves, every day.