The key to understanding this properly is that the “understanding” in the first category is taken to be right, good understanding, which by stipulation your rel

The key to understanding this properly is that the “understanding” in the first category is taken to be right, good understanding, which by stipulation your relative does not have. When Aristotle means someone’s own opinion, he uses a different word like “doxa”, how things appear to people, which is translated as belief or opinion.