Answer:
want to make clear to readers that they understand the issue
Step-by-step explanation:
Sometimes when writers talk about their view on a subject, they don't see the other point of view. The only see their side of the argument and not the opposing side. However, when writers anticipate(expect) the opposing argument and understand what the people on the other side are arguing, then they understand the full picture.
This does not mean that they haven't found enough evidence, haven't chosen a side, or want to look at the opposing weaknesses. They want to address all sides of the argument and show both the strong points and flaws.